It really is best for everyone if you just move to the back of the bus...including for yourself. Because, you see, if you don't, but then other people (who aren't jerks or idiots) who actually want to get to the back have to go around you. In order to let them pass you (kind soul that you are) you have to lean back awkwardly and probably take a bit of a step. But then that step might cause you to almost step on some poor girl's (who may or may not have a transit blog) foot. Unfortunately for you, that girl is on top of things and to prevent such a misfortune to her own foot, she is forced to jam her fist into your back to keep you from backing up.
Moral of the story: if you don't want to be punched by a passive aggressive blogger, you should just move to the back of the bus.