You find this is an argument you can't easliy dismiss? David Einhorn is personally worth $1.25 billion and Bill Ackman is worth a similar amount and you think that they're going to pack it in over an HFT making it slightly more difficult to place an order? The rise of HFT hasn't stopped Bill Ackman from making huge bets on companies like Herbalife and JC Penny. I won't even get into the fact that he probably paid less to execute that large order than he would have in the previous pit trader environment.