My claim is simply that participants in this forum are statistically unlikely to be dangerous people. Mainly a consequence of (what I perceive to be) the small size of the community .

Why? How is this supposed to work?

I wonder if maybe Alicorn pictures some type of shady misogynist character willing to blurt the statement out loud in public (perhaps while drunk), whereas I picture a shy misunderstood "nerd" who would never dream of saying such a thing except anonymously in an unusually open-minded online community.

So you're saying that the only relevant difference, and the reason men in this community are less likely to actually rape women, is that they're more shy? And maybe don't get drunk in public?

I'm aware that's probably not what you meant, but it's the literal meaning of your words. You need a better argument in favor of what seems to be your actual position - "people interested and/or adept in rationality are less likely to rape out of a sense of entitlement".