Well, those wouldn't be MUD's, so it's an area I know little about. I do remember someone in college with me had a bot for a game like that, but that was years ago. A simple way to stop it though, would be the same bot checks they use for signing up for new accounts at a website, as in 'type in the random, case sensitive letters and/or numbers you see in this picture' sorta thing. You'd probably have to do it before/after each game/round though. All that's theory though, I usually don't play minigames, so take it with a grain of salt.
