I too havent been in the position, either positively or negatively on any *serious* level of play
Though have seen, and spoken to some who's very attitude just *felt* wrong...
this may well have been my own prejudgement >though my experience as a witness to sub-domm/me play isnt so small as to say Im closed-minded< and perhaps, those speaking were playing to an audience, making themselves appear *bigger* or *badder* than thier play limits allow... however, some things witnessed have been quite disturbing.
That said... also I have had the pleasure of witnessing, and speaking to the participants of safe, consensua l>sp?< role/power/bdsm play and the degree of care, thought and concern applied during *scening* has been immense, and the levels of respect shown and given, the same.
Once again... there are all sorts of people out there... not all nice, but many are.
LP