I would be interested to hear any high-limit online players comment on this thread on neverwinpoker. Dan Druff, aka Todd Witteles, 2005 WSOP bracelet winner, has been running so bad in the Stars 100/200 than he is entertaining some notions about a "kill switch" that makes certain players lose. He does NOT say he believes in it, but he seems to be seriously considering it as an idea. Notice he doesn't have pokertracker, so there isn't any hard data.
thread is here