I was also sexually abused and the damage done was very difficult to overcome growing up. I don't think people realize just how much damage is done either unless they have been through it. It was through the my faith in Christ and His healing touch that I was healed and set free.
I have worked with convicted pedophiles as a case manager and they all reoffended and ended up back in jail. You are right, parents of children had better stay on top of things and watch out for the red flags. Most of the more adept perps are like pied pipers for children. They are very manipulative and can be quite charming. The cunning ones don't LOOK like your average chester the molester.
you are right only God can erase the guilt and pain you feel. Children always feel like they are at fault. Now I can spot a pervert a mile away and I am right 99% of the time. I also watched my children and now my grandchildren sometimes too close i think. very rarely were my children allowed to spend the night at other people's home.