People who are just different than me I can deal with. Its when some drunk guy falls over when the train accelerates, assumes he was pushed, and starts screaming at the woman who was behind him and telling her that he's going to put a bullet in her head that makes me think I might be reluctant to use public transportation if I wasn't a relatively burly guy.

I can't disagree with the circumstance, but I don't like the implicit assumption that public transport is always destined to be this way (whilst driverless cars might revolutionise their own sector). IMHO every city that loathes public transport (and because of this they generally don't put the money into providing a safe, accessible, and attractive service) suffers greatly for it, both financially and culturally...