Set it up so people can't start entering games unless they read and accept the "rules of play" beforehand. I'm not much of a coder, but you should be able to link profiles to an acceptance of reading through the rules.

Just out of curiosity, why is it set up that you lose more points the longer you stay in the game, i.e. the first person out loses 12, the next loses 14, and the last person out loses 18?

I don't really see the logic in this, as it seems it should be the other way around, but I may be missing ...