How cute passing blame on supporting him to people like myself who aren't fans of uptight collectors.
I really don't see any merit in attacking him and I'd rather not see him run off the site from posting again for a few more months or for good this time. Is it really worth it to make a point even if you can't back your shit up any better than he can other than words. He won't prove he can do it because it would give proof of concept, and you won't prove he can't because you can't prove it's impossible. Just leave it be.