And the great thing is, even if it is multiple choice or true/false and really easy, it still requires them to have knowledge of the rules. I mean we could do something like this:

"Is it all right to post porn? Yes or no"

"Is it all right to flame others? Yes or no"

Etc. etc.

Throw in a few reversed questions for good measure so they can't just select one for all of them and we're good to go.