These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Canon Sue: Johnny. He has no known flaws unlike the rest of the gang and isn't given any depth other than the fact that he's a Nice Guy who's abused by his parents, is Dally's Morality Pet, and is Ponyboy's best friend. The rest of the gang adores him and never gets angry at him, and Two-Bit even says that the gang can go without anyone but Johnny.
Idiot Plot: After killing Bob, instead of going on the run and hiding from the police (as if THEY did anything bad), Johnny and Ponyboy could have just gone to the police, turned themselves in, explained that Johnny killed Bob to protect Ponyboy, and counter sued the socs. By going into hiding, Johnny and Ponyboy got themselves into a lot of trouble that could have easily been avoided if they had just explained that it was a killing done in defense of another person.
Except, of course, that it's their word against the social elites of the towns who probably have parents with greater influence and funds than they do. At best, the police would have a hard time believing them and, at worst, they would put them in prison.
Moral Event Horizon: Bob crosses the line when he tries to drown Ponyboy. This is where the Socs graduate from mere bullying to attempted murder.
They're waterboarding him (very, very crudely) in the film. It still looks like they're drowning him, so still a MEH in-universe.
In the book, Darry could count as something of a Jerkass Woobie, since although Ponyboy is pretty well convinced his brother doesn't care about him (as he can be pretty cold and harsh at times), he's still trying quite hard to keep his family together and gave up a lot so that they'd get to stay together. Despite the way he acts sometimes, it's hard not to feel sorry for a twenty year old guy who's lost his parents and suddenly has to head his family.
It's also important to remember Darry was college bound before his parents died. While he couldn't fully afford it, he was smart (and poor) enough to get scholarships. Instead, he didn't go to college and is struggling to keep his brothers from being trapped like he is.