Could never do that. Not coolheaded enough to pull it off and it doesn't feel right. Also, those who get busted get suspended for 1 year minimum, and it wouldn't look too good in the eyes of any employer, but particularly in the field of Law, where there's so much professional ethics involved. Cheating is not an option for me.
There are some who always cheat, though, according to surveys, and those bastards tend to get the results they want as well.