Clearly, a fair number of the horrible customers are senile, and some seem like they might have some kind of aphasia or something. Some of those are still funny, but others just leave you wondering if the customers were getting the help they needed... of a non-customer-service kind.
... Or the help we need them to get, as the case may be. Some of these people come off as just plain dangerous. One gets the impression that, years from now, some of these workers will be watching the news one day and thinking, "Hey, wait, isn't he that guy who... oh my god..." Or looking at the next car and...
Some of the stories appear to give a little view into quite messed up home lives... which distracts from the potential funny of an anecdote.
Almost any story regarding the stupidity or selfishness of a parent can become Fridge Horror when you think about it because it makes you wonder just how they are raising those kids... or if they're raising them at all.
While it feels like poetic justice how an abusive misogynist gets his comeuppance here, it's less fun when you note that his behaviour shows many telltale marks of a child abuse victim. Namely, that the only way he can approach a social problem is with threats of violence, but as soon as even a hint of such threat is directed towards his own person, he completely loses his mind and falls into panic.
Due to the sheer volume and vitriol behind his woman-hating rants, it seems like he spent a large part of his childhood not only suffering abuse to himself, but also watching his father abuse his mother. Most people don't scream things like "You’ll crack and resign from your job and find yourself a man that will teach you what is it to be a good woman! You’ll find a guy who will beat you into a submissive b***, like any good woman should be!” Doesn't excuse his behavior by a long shot (and certainly doesn't make it right), but it goes a long way to explain it.
The female writer is alone on the bus when approached by three men. She is out numbered 3:1, they are larger than her, they won't take no for an answer, and are trying to get her to go off with them (without anyone else knowing her whereabouts). Thankfully, this story has a happy ending thanks to a passing good Samaritan.
This guy seems to have come to the conclusion that America's goal in The Vietnam War was, rather than keep the communist-friendly North from conquering the America-friendly South, to eliminate the Vietnamese people entirely. On top of that, he seems to think Americans in general are still looking for "survivors" and killing them on sight. What makes it fridge horror is that he is completely fine with the idea of one of the most powerful militaries in the world deciding other races no longer deserve to exist. He even threatens an actual Vietnamese person with "calling the Americans" to come shoot him when said Vietnamese person dares to suggest that maybe he has no clue what he's talking about.
While the ending of this story puts the complainer in something of an Ironic Hell (in a very long wait line for cancelling their service), you have to wonder what this company's doing wrong in order to get such a long line. The people trying to get the service cancelled can't all be making mistakes like the customer in the story.