I like the "cheater's list" idea. The tournament director should have the right to refuse any entry in a tournament. If someone wants to enter and their name is on the "cheater's list", it's up to the tournament director whether or not to accept the entry.

I know when I was at Murray State, in regards to fraternity parties, there was a list distributed by the university to all fraternities that included names of individuals who were not allowed at any party due to their history of starting fights. The system worked and fights were greatly reduced.

Maybe with a "cheater's list", cheating may not be completely eliminated, but would be greatly reduced.