Couples - Yea. Learned that the hard way.
Kissing - People don't need to put their buiness out there like that, or enemies could get said information.
Band-Aids - I hate that too! Isn't it just better to let them get air, as long as your not, say, gardening?
Teachers - Another thing I hate is when they punish the WHOLE CLASS for a few people's actions, especially if they know who did it.