Ironic, in that what he was trying to communicate was some concepts regarding recognizing the moral reality of those around him, when, in fact, he was one of those clueless types who likely hadn't considered the possibility that his whacking-away at his keyboard was really annoying others.
As to why the "riff-raff" tend to be a little more considerate on public transport - One reason is usually because you don't want to piss somebody off and get a punch to the head. They tend to play things a little more roughly on Oakland public transport than they do on Amtrak.