That's a good one, another poster above suggested something similar. I believe that HN'ers would play fair in something like this.

On the other hand that isn't proof of anything, but I think the changes are higher that someone will own up that didn't do it to throw sand in the eyes of the searchers than the reverse.

But then again, maybe I'm a sucker and I believe that people in general are honest and trustworthy. So far that seems to me to be a better assumption than the reverse.