JC - I understand your concern, but you know of course, that your neighborhood is exactly the same as it was before you had this information.
These sites have varying degrees of reliability - wrong guy, wrong address wrong crime etc.
Child molesters, like anyone else, don’t simply stay at their house. So, even if your neighborhood had zero, that doesn’t mean that some one didn’t walk through, drive through, visit etc.
These web sites can in fact give some people a false sense of security (gee, there’s none in my neighborhood).
Your feelings demonstrate one of my reasons I’m not in favor of these things (‘what do I do now?’ kind of response).
OTOH. THere are things that every parent can do to minimize the risk of their child being molested. Keep in mind that many/most molestations are done by trusted people (family members, friends etc). here are things I’ve posted before about what I taught my son to make him a bad victim:
I taught him that he should NEVER keep a secret from me and if some one told him to do so, to hurry and tell me right away. I told him to never go anywhere unless I knew about it first. Not simply “dont’ go to that man’s house” or “get into cars with strangeres”. Molesters are very, very good at getting kids to comply with them (Here, I’ve got something to show you. Can you help me find my puppy? etc). Molestations can occur in closets, cars, open areas etc.
I taught him that if some one tried to physically grab at him, he should scream bloody hell. I’ve taught him to tell me immediately if ANYONE ever wants to take his picture, give him a present, have him go somewhere, play “special” games.
Avoid using the terms “grown up” or “stranger”. Molesters can often be neither.
And, to keep the focus on how little usable info those web sites can really give:
Just take a moment to think about how FEW people you meet on a daily basis for whom you have an address. Megan’s Laws may give you some semi current, correct information about past history of some of the people whose address you know. It will give you zero information on the person who’s delivering pizzas to your neighbor, the cousin visiting the folks across the street, the man walking his dog, the customer in line behind you, the person sitting next to you in the movie theater, the other parent visiting their child at school.
Bottom line - to best protect your child, make them a bad victim. You should sleep better knowing you’ve done what you can to minimize the risk to your child.