I'm getting ready to activate a special anti-spammer question that people who want to register for our fair forum need to answer correctly before they can join the board.

Sounds easy enough, but what would be the best question that all mountain bikers would know but spammers probably wouldn't?

If they figured it out it wouldn't be the end of the world, but it would be nice to have something to frustrate the riff raff.

Post your suggestions / comments here.

pk