The songs banned at my camp were generally songs that the counselors (or dean) just could not stand to listen to anymore. We never told the kids the song was banned, so if they remembered it from the previous year and started singing it we might just go along with it, but we tried our hardest not to bring it up. One song in particular that I remember loving at a camper that we banned last year was the bubble gum song, the chorus of which went a little something like this:

Na-na-na-na-na BUBBLEGUM!
Na-na-na-na-na BUBBLEGUM!
Na-na-na-na-na BUBBLEGUM!
I BOUGHT SOME BUBBLEGUM!

Sung while jumping up and down and spinning in circles. Ah, memories.