Sorry, Steel, that really sucks
Unfortunately it's probably a case of too many kids have been smartasses to them so they assume you are just like them. And again like I said, there are some cops that are gonna be dicks just because. Sometimes you win, sometimes you don't. If I was encountered a nasty cop, I would be nice still and then later thank God I don't have a big stick rammed up my butt like the cop did. My wild guess is you (meaning general, not you personally) gotta have some nasty issues if you are gonna be mean to people for no good reason.