Because the stated 75% criteria produces a negligible yet discernible chance that we get a false trigger at an actual 67% adoption rate due to variance? Yawn. Troll harder.
Uhm, no. He shows pretty conclusively that
5. Summary
As it stands, the BIP101 has implementation flaws that could cause BIP101 activation with a significantly sub-supermajority, or (in the presence of fake BIP101 voters) a minority. It is almost certain that if BIP101 is activated, it will be with a sub-supermajority, or even a minority.
It also allows true proportions of fake voters to be sufficiently low that it becomes quite possible for one large mining pool or a couple of smaller ones in collusion contributing fake BIP101 votes to cause premature BIP101 activation.
Emphasis is mine. If you want to present math that disproves OrganofCorti's, feel free. Calling me a troll for pointing out OrganOfCorti's excellent blog post is just childish.