it's awkward for you, but on the other hand, it doesn't have much to do with you. you didn't cause the problem and you're just doing what you've been told. if they don't do what they're told, you're all in danger, so the supervisor is right to speak up about it.

it would be nice if your supervisor took some responsibility for causing the problem in the first place, and nicer still if she was smart enough to know that making you into the good kid and them the bad kids would not help morale. positive reinforcement is usually better when you can manage it.

but that's out of your hands. gimmeice is right -- better to be unpopular than unemployed, especially these days.