Actually, I was considering voting for Cain until he played the race card.
I suspect that many of the most obnoxious Cain trolls are Romneybots or democrats who only want to split up the Conservative vote.
The democrats don’t care whether Romney or Cain wins because they know neither of them will win the Presidency.
I suspect the RomneyBots pretending to support Cain are being obnoxious to intentionally drive down Cain’s support a bit so he merely splits the Conservative vote but poses no threat to Romney winning the nomination.