While we're on the subject, here's a link http://www.pcmag.com/article2/0,4149,748540,00.asp to a recent article in PC Magazine web page about another way you can help protect your child: frequently take and store their photographs with a digital camera. If, heaven forbid, you ever need to, you can email them to the National Center for Missing and Exploited Children and other appropriate agencies for rapid and wide distribution.
 
I thought I'd mention this link since a lot of cachers have digital cameras, but if you're a parent who doesn't have one and Santa doesn't come through, the article also describes a free program that Toys R Us expects to start in February. They'll photograph your kids and give you the images on a floppy to take with you.

Steve
Team Tierra Buena
There is a very fine line between "hobby" and "mental illness". -- Dave Barry