Do you know what's not cool? I'll tell you what's not cool---
Boyfriends and girlfriends who take advantage of a crowd in order to fuck with the person they're with.
Example: In front of friends or parents, the girl will MESS with the guy to no end... pulling at his hair, poking him, and "fake" hitting him and calling him names. And the guy's just trying to gently bat her away, when the look on his face is just so miserable. (I'm using a girl as an example because it's the one I just encountered).
If these people were in private, the guy would feel more comfortable about saying, "Oh my God, that's so annoying, PLEASE STOP!" But because there's a crowd and he doesn't want to seem like a jerk, he clams up and has to take it. (Frankly, I wouldn't have blamed him for saying something, but I know he didn't want to risk a public fight).
COME ON. That's SO damn childish! Gragh! Nice people don't deserve that!!!