What's wrong with Voldemort inferring from the study that some regular strategies for identifying sociopaths may be less effective on LessWrong? Though I may be putting words in his mouth at this point.

One could say that people on LW are more clever and rational overall so they find new strategies for identifying them, but I'm not so sure, we are rather tribal about the "rationalist community" (this is in fact endorsed as a feature not a bug), are we sure we won't be biased against someone who proposed a novel or an efficient way to detect their likely presence?