If you are on about board games... ( 

https://www.flyordie.com/legal.html#rules

 )

Engines/programs in board games

FlyOrDie members have the right to know if they are playing against a computer. Therefore you must declare in your player settings if you are using assistance while playing. Using any kind of assistance without declaration is considered extremely unsportsmanlike with appropriate sanctions. You can have one human account and one program account, and you must use both accordingly. Use of such assistance is only allowed in board games.

Who the heck would cheat on a game with an opponent that they don't even know?

Some people cheat in games on the Internet. They don't care who their opponents are. They think they're entitled to get what they want instead of practicing and working hard for it. :s

Its like people who only play guests or 0 player, losing is too much for there egos or relaxation.