Exactly my first thoughts John, though try as I did, I couldn't think of a sensible word combination that would have resulted in a ban!
On the other hand, I heard a funny story (supposedely true) a good few years back about someone whose positive feedback was rejected by Ebay, for use of the words "who really" (used in a complimentary sense). Apparently, he wasn't supposed to use the word "whore" (whore ally / who really?? Oh yes - got it now!)!!