Sorry to be indelicate,
but if a screener comes running out of the "private room" howling in agony, with one of these things attached to his/her finger, the gig's up:
http://www.alumniroundup.com/2010/06...om-with-teeth/
Personally, I'm deeply offended that the social and political conditions in the U.S. have declined to the point where we'd ever contemplate it.