Some guy hit on a chick while they were alone in an elevator at a skeptic convention. She felt cornered and vulnerable because they were in a confined space with no immediate way of escape, and mentioned the encounter to some of her friends. Normal people might say 'Oh I see her point of view and that's probably something to be more sensitive about when you're out taming strange, but I'm sure it was unintentional and never would have occurred to him that the setting they were in might have made her feel uncomfortable because men generally don't need to worry about being randomly stranger-raped'., but because skeptics are insufferable faggots who are obsessed with feeling objectively and provably right about everything, the entire community took sides and split into rabid, seething factions and tore each other to pieces.
Dawkins took a side, I forget which one, but that's pretty much the sum of his involvement.