xkcd: As if Riding the Train Doesn't Make You Anti-Social Enough

Alt: And the journal is filled with all the things I'd say to her if I were nice like you. I burn it when it's full.

I've known a few of these people. I loved riding Trax, except during rush hour, because people invade your space, and I don't do well when that happens. Especially when I can't punch people.