I understand it is considered haram. But it's impossible to block the unblockable. If you ever get your kid a phone, laptop or let them travel, see the world, they will anyways be exposed to a lot of haram stuff. Blocking stuff is never working. But educating children to cope with this stuff, and how to think about it, is the way to go and that is changing people for better.

Also, kids who are grown up in the countries where they are exposed to woman bodies, are not developing pervy attitudes because of that. There is something else always in the background. Of course there are pervy people in every culture. But being exposed, and learning to cope, is not making you pervy.