Beware the paedos

Hi guys and girls anybody else been contacted by filthy paedos s on here, I've had a couple on here one guy asked if he could see pics of my daughter, told him he was lucky he was hiding behind a computer screen, cos if I ever met him I would cave his head in, and also another sent me a pic of a 13 y o girl in a bikini, on Skype, instantly blocked him YOU KNOW WHO YOU ARE. Just wondering if anybody else has had contact with this filth and wondering what we can do do to stop these vermin, any thoughts