Knowing where your children are and who they are with at all times is what counts.  Also, children need to be carefully taught not to go into a neighbor's house no matter how nice and pleasant they seem. Parents who let their kids roam the neighborhood at will all day without ever requiring them to check in periodically leave their kids wide-open to the advances of a predator.  Kids don't understand "stranger" the way adults do.  In a kid's mind, after a person has spoken kindly to them and given them a few minutes of attention, that person's no longer a stranger to them and they'll more times than not take right up with them.