How am I ignoring the game theory? I already explained why/how NotXT exacerbates the risk for defections to XT, by minimizing its chances of success. And OrganOfCorti mathed the hell out of that, leaving no doubt those
brave enough to accept XTcoins are going to have a bad time.

What is it that you don't get? Slush is indicating support for >1MB blocks via XT/BIP101. Since no version of XT or only-bigblocks or Core will accept >1MB blocks prior to January 2016 then it doesn't matter that he hasn't updated to XT or BIP 101 mining prior to then. Is your point that the NotXTers will move to BIP101 or XT in January 2016? That seems to not quite be in the spirit of NotXT.
I read the OrganOfCorti comments - he used numbers ranging between 0.16 and 0.21 of fake voters. That's fine - if it's a small number of fakers then it doesn't matter. The more the fake votes increase, the better the chance for 'premature activation'. Go ahead...run NotXT - gamble away, but you sure can't take the moral high ground.
Moral high ground? When did that become an issue? This is war, not an ethics symposium!

Corti demonstrated a small number of fakers is unlikely to matter immediately, but because XT
features a perpetual election even low probabilities manifest eventually.
Your hand-waving "it doesn't matter that [slush] hasn't updated to XT" objection sounds like imaginary_username, who likewise fails to understand
If you're only pretending to run a version of bitcoin that has BIP101 implemented by changing your header version, that is spoofing, regardless of what your intentions are.
The header version is supposed to show that your nodes will actually accept a >1MB block as per BIP101, not that you support the idea of BIP101.