I would agree that most of them are reef safe. I have one that loves to pick at my anemonies and shrooms. I've tried target feeding moving rocks around threats etc.. to no avail. I finally ended up donating it back to a lfs. None of the others have ever caused any problems in my tank and They were all bought at the same time and seem to be the same species. It took it about 5 or 6 months before it started exhibiting these behaviors.
though you might want to know
chris