What is known about the offender @bombastix ?
I agree with 'not all men', it really is not helpful. A curfew wouldn't work as those with violent tendencies will engage in depravity online.
What I have observed is that many parents raise their sons without firm guidance and boundaries. Many of the boys in my dc's year groups at school are out of control. They are disruptive and disrespectful in the classroom (SEN aside), they swear and say sexist and things to the girls. Some boys are lovely, they usually come from stable loving interested middle-middle class families with secure attachment and nice extended family, such as involved and interested GP.
However, not all middle class boys are well behaved. There was a boy when dd was in reception who was jumping with her on a trampoline at a 5th birthday party in someone's garden. Out of nowhere, he pushed her with all his might and she flew across the trampoline and hurt herself. The same boy pushed dd hard so that she fell on the edge of a table in their classroom in year 5 and had a visible mark from it. I don't want to know what this boy is up to now. Those violent boys and men are also really bad news for nice boys.
I worry that tween and teen boys spend much time online playing violent games and consuming mindless violent content. I don't know what the answer is.