For instance, someone might post "aibu to think people with dirty fingernails are a bit mingin'?"
Now, in real life if I see someone with dirty fingernails I'd think it a bit minging too, but I'd likely reply that they were being unreasonable.
Doesn't make sense, but I cant be the only person because aibu threads are very much at odds with rl I think, where we all just tend to rub along.
Maybe its tha act of posting and inviting others to join in on the judgeyness that gets my back up? Like, thinking it is one thing but you cross a line when inviting a bunch of other people to come and point and sneer too...?