Try never to let them know when they hit you with a " 'Gotcha !' moment " that scored.....
A can of beer on a crowded subway --- It's not quite the stuff of a Nuremberg prosecution, you know --- Certainly, given the public intoxication standards of one or two of our local elected Republicans, and the consequences for them, this is very light beer indeed
Going full counter-force against various perceived "routine suspects" was neither the best tactic nor the best strategy for the top local Reform Party guy.
Instead, I would have countered with something witty like this: "The 'standing woman' in question (and in the photo) really looked like she had probably chosen her spot with an eye toward some good healthy IRT-quality frottage. I offered her my seat, but she demurred and said that her chosen spot was where she really wanted to be.... Who was I to interfere with her life choices ?"