Shane has cast this guy in some of his recent movies without facing any problems. being his friend he probably knows the guy made a huge and sick mistake 10 years ago and is trying to help him get back to his feet. I think people like you who assume this guy is just going to walk round the set trying to molest children when he can are massively overreacting, there's hundreds of people on sets so I imagine it's a safe environment. As wrong as it is trying to entice underagers into sexual acts it's not as if he's actually physically assaulted someone sexually.
I also don't get why Munn deserve to have a choice, she is not a child, how is this man a threat to her in any way? it's been 10 years, he's served his time, give the guy a chance.