Alternatively I would suggest that there is some betting market, every time you down/upvote something you are making a bet on your karma, so if it later somehow turns out that your bet was "wrong" you will lose karma, but I'm not sure how it would be possible to implement this.

This is a very interesting statement given that I and others have repeatedly suggested that to get people to listen to you about 9/11 issues you could use Intrade, PredictionBook, Longbets or make a specific bet with someone here.(Example discussion one, example discussion two).

So apparently you want to make other people risk resources but not yourself. Do you see why this sort of attitude is going to prompt downvotes? (And of course, I'm still willing to make a monetary bet along the lines discussed earlier.)