Yes, it wasn't obvious to me. Partly because I expect common hostility to be mislabelled as trolling, and partly because even just the obvious hostility was enough that it didn't seem worth paying that much attention to - it looked like a classic example of politics as the mind killer. The thing about freezing and cryogenics though - it seems like someone from lesswrong would already know the counter argument, and 911truther did seem familiar with lesswrong. I have updated towards the troll possibility.

ETA: I hadn't read the genetic algorithm comment until now, so there's another example of me missing evidence of trolling. The thing is, paying more attention doesn't seem like a good idea. I am glad I read your comment to point me a specific example rather than their whole comment history.