If you're going to break the bike rule, at least don't act entitled
Asshole Rider of the Day
I'm about to get on the (no bikes) evening train when a guy with his mountain bike cuts me off to get on the train ahead of me. Then, he asks an old man who can't be younger than 70 to move to the other side so he can sit with his bike. He sits in the isle so someone else will have to sit behind his dirty tire, then when the train gets full he hassles someone for bumping him.
That is the worst behavior I've seen on BART for a while, it's been pretty tame recently.