Well I have not looked, but I know I play a mixture of regular and anti games, and I have caught myself a few times starting to make multiply jumps in an anti game - but so far, I have always caught myself before submiting.
Even though the board has a red outline, when you are playing many many games, it's something that you can easly look over. :-)
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)