The harassment numbers are not really huge. Feminists try to maintain a list and I think it clearly shows that incidents are rare - and half the items on the list are even cases I personally wouldn't count. But even if you count them all, given the huge amount of IT events, it is a very short list.

I think at the last Chaos Computing Congress there were a huge number of incidents and feminist campaigners threatening people with self-made "red cards". Just to mention one example that might be easily googleable.