I didn't say it was "all men". I said, deliberately, "some men". I know of many, very supportive, men in technology, who understand what it is to get this stuff right. It's a real shame that there are some who wilfully ignore the issue's existence, or who exacerbate it, or who think that women should just "lighten up" about it.

As a man in technology, you come with a whole heap of privilege, you need to understand what it's like from the other side. That tumblr rightly calls out people in tech who are dicks, particularly to women. Without sites like this, people might continue thinking that this sort of behaviour is acceptable.