We delete these on a regular basis, but not crazy theories which we disagree with....
I guess that goes to the heart of an important issue for both sites - "alternative" is fine, since who's to say they might not have a useful point, and "off topic" is equally tolerated. But what about "so crazy there's no chance they have a point" combined with "posted constantly".... There comes a time when it amounts to clutter, and detracts from the value of the site doesn't there?