This one didn't occur to me until nearly 20 years after the initial release of the film. When the gang gets to lunchtime, Bender immediately goes around asking people what they've got for lunch and ridiculing the stuff they've got. He then moves off to sit somewhere else. He doesn't eat lunch. On reflection, given he's basically from an abusive household, of course they wouldn't have packed his lunch for him. That's why he fronts the other about their lunches — he's trying to distract them from the fact he hasn't got any.
Why couldn't Bender pack his own lunch?
He probably didn't have any chance. Or nothing to bring for lunch (neglectful parents, too).
It pretty much matches up with the concept that bullies are often the ones crying out for attention. Bender is a complete jerk, but if you look at it closely enough, he deliberately pushes discussions hard enough that the other kids eventually have to react - like the point where he eventually blows up after showing the cigarette burns his father gave him. Vernon doesn't notice because he's the authoritarian, and had probably dealt with hundreds of people like Bender, but the other kids do. On the one hand, Bender doesn't want to talk about his issues - which is why he deflects stuff. On the other, he probably does want to let it out. It doesn't excuse the way he treats pretty much everyone in the film except Allison, but it's a likely explanation. Even his somewhat triumphant pose at the end could be down to the fact that he just might have some people there for him, now - as well as being just a little iconic.
The ironic echo used in the movie "You don't even count. You could disappear forever, and it wouldn't make any difference. You might as well not even exist at this school." First in the beginning of the movie Andy says it to Bender. If you watch Judd Nelson's face, you can see some hurt that, now that I think about it, is very much intentional. So Bender fires something back and they all move on. Next, near the end of the movie when Bender sarcastically makes fun of Claire's lipstick-talent-thingy. Andy scolds Bender for saying such mean things. Then Bender repeats what Andy had said to him, first to point out how hypocritical he is for even saying that, but then you realize "it really did hurt Bender, what Andy said. It doesn't matter how tough you may or may not be, words tend to stick and hurt and last. Almost Freudian excuse like, but it brings it back to Bender always crying out for attention. He wants people to notice if he is there or not, if he is okay; it's human nature. And the only way he knows how is to act out and be a total jerks!"
Consider what the movie says about the prestigious/successful: Claire's parents are rich, but they're also divorcing and emotionally abusing their daughter, who is unhappy and upset because of the position her peers force her into. The principal evidently doesn't like his job, despite the fact that principal is quite a respected position. Carl, who was once his class's Man of the Year, is a janitor. Brian's parents force him to work hard, not caring about how much stress he's under, and Andy's father has alienated his son to the point that Andy wants to give up a sport he's good at so his father will leave him alone. From this, the underlying message of the film might well be construed as 'Success/riches/prestige don't equal happiness, so don't force yourself or others to achieve them'.
On the topic of Carl, the movie is about breaking down social barriers and features characters that are all ranked differently on the school hierarchy. Andy is at the top (as a representative of the school), Claire is a step below, Bender is in the middle, Brian is on the lower end and Alison is at the bottom (being ignored by everyone). Carl is there to show that you shouldn't waste time worrying about who society says you should care about and just be friends with who you want. This also extends to family, as the five characters have dreadful parents yet are expected to maintain close relationships with them because of blood ties.
The main page points out Alison's nature as an attention whore but also states that she doesn't realize that she's doing it, which is arguably the entire point of her characterization. She is an attention whore like Bender, just in more subtle ways at first. She gradually opens up, says things that she thinks will make Andy interested, proceeds to work her way into conversations, and then explicitly reveals why, in that her parents ignore her. So she is an attention whore, but not in the traditional sense of usually being spoiled for attention and the like - she's merely overcompensating to make people take notice, which her story regarding her therapist makes entirely clear; She's also a pathological liar, which also suggests that if her parents ever did ask her if she was okay, she could tell them she was fine because the damage was already done, and explains her tall tales about drinking to Andy.
I always wonder why the movie was called Breakfast Club. Later on, I learned that "breakfast" literally means "to break bread", and in Biblical times, it was a part of a day for friends to get together. So, by the end of the film, the misfits have considered on another friends.
Maybe everyone realizes this one by now, but regarding Bender's life, you have to wonder what keeps him going. His life at school is horrible: bad grades, principal and teachers don't like him, and it appears that the rest of school doesn't either, going by what Vernon told him ("You're a lying sack of shit and everyone knows it"), his life at home is evenworse (and speaking from personal experience, this may explain the bad grades), he doesn't seem to have any ambition for himself, so it begs the question of how does he go on? His friends. Sadly, we only get a glimpse into the dynamic between his relationship with them, but watch how defensive he gets when Claire says they would laugh at him for being seen with her. It also marks one of the few times in the movie where he genuinely gets angry as opposed to just acting cocky or disrespectful.
Claire and Bender's relationship if one looked at it in a more cynical mindset.
Pay close attention to the opening and the kids arriving with their parents; At first glance, Bender almost gets run down by Alison's parents because he's walking into the road. Looking closer, Bender is already crossing the road when he nearly gets driven into - Alison's parents making an incredibly abrupt stop. Fridge Horror kicks in when you realize that if Alison's parents don't care about her, why would they care about or notice anyone else's kids?
Also note that Bender doesn't look before crossing the road to make sure there isn't a car coming. His home life is so screwed up that he doesn't even care if he gets hit by a car.
Chances are that the kids would be arrested by Monday. Their clothes probably smell like pot and so did most of the library. While the the other parents are neglectful, Brian's parents will probably notice something like their son's clothes smelling like narcotics after a botched suicide attempt. Doubtful he can stand up to police interrogation.
As big as the library is, the pot smell will more than likely disappear before too long. Allison could've also had an aerosol deodorant spray or frebreze in her bag to cover up the smell as well. Bender also smoked a cigarette in the room at the beginning of the movie, and Vernon didn't say anything. Unless smoked habitually in an area, cigarette smoke lingers on more than weed smoke.
And what makes you think that Brian's parents would even recognise pot smoke?
When you combine Vernon's attitude towards his job, the dysfunctional/abusive backgrounds of all the kids, and the disrepair of Shermer High as seen in the opening (messy tables, ashes on the floor, etc.), it'll eventually hit you in the face that is as much a Crapsack World as Neon Genesis Evangelion.
None of the adults seemed too concerned about the fact that Brian brought a gun to school, even if it was a flare gun.
The whole subplot with Brian's parents. What exactly is their son going to get out of their extreme pressure to make perfect grades? They could have found other ways of encouraging him instead of mental cruelty.
They probably saw him as a slacker who needed that pressure to make anything out of himself.
Truth in Television. Parents like Brian's aren't always reasonable. There are plenty of cases like his in Real Life where parents just don't understand how cruel their levels of pressure are - or who, for any number of reasons, genuinely believe that cruelty is better for their child in the long run.
My own parents used to say, "If you put pressure on coal, you get a diamond."
It seems odd that kids in -detention- are left entirely unsupervised for large portions of the movie. Even in the 80s.
There's nobody there except the kids, Carl and Vernon. Carl has his own job to do and Vernon hates his job- he's there on a Saturday, who wouldn't? But he doesn't care enough to actually do a good job, nor does he care what they get up to. He just wants it to be over so he can go home. The only time he interfered was when he overheard a noise (like Bender falling through the ceiling) or when he caught them in the act (Bender in the gymnasium)