Czuch: Shhhhhh! Yes, detecting computer cheating is unenforceable from a practical point of view. So are most of the scams that the few cheaters employ as there's only one Fencer and he's a mite busy most of the time, lol. But there are curious and alert players here who stumble across these things on occasion.

(Note that an account where the playing is done solely by a computer and this is made known - that should not be seen as cheating. It's more the provision of a fine opponent for those who want to challenge it.)