I have seen questionable activity in a freeroll tournament when getting down to the end where everybody would receive the same prize ( a ticket to the next satellite). One person needs to get eliminated for everybody else to move on. The monster chip leader with 63,000 in chips raises 4,500 chips. Another guys shoves all in with 8,300 chips. Everybody else folds and it comes back to the chip leader who then folds. I have an issue with that. If I were the monster chip leader and that happened to me, it would be a no brainer but to make the call, even if I had 7 2 unsuited. So yes, intuitively I believe there can be cheating online.