Yeah there are plenty of arrogant bastards.... personally, I don't even tell people I'm doing the whole premed thing unless specifically asked. And if anyone asks me what I want to do after college, I simply say I would like to attend a professional school (and I stop there unless questioned further)
Some people say they are 'premed' like they have earned something, or like they are superior - and that pisses people off; and it should piss people off if you say it like that! As everyone here knows, premed is just a self-given title (unless your school actually has a premed major, even though it should probably just be called something along the lines of bio instead), you probably haven't done anything to earn it, and theres a pretty large chance you won't even end up in medical school.
it's like saying, hey, I'm pre-millionaire, or I'm pre-awesome.... haha