In Dan Harrington's second book "Harrington on Hold'em" Expert Strategy for No-limit Tournaments he shows a way to calculate the expected value of a move.Even if I set the BB to a really loose player, calling with KQ, KJ, QJ, the expected value of the move is still 2900 chips..that means that if you did the same move a 1000 times, you would end up with 2900 in average result.If you set the BB to just beeing a loose player, not a maniac, you get a expected value of 2800 chips.If you in average loose 200-300 chips every time you do this, it is really a bad move!!