Cornflower, you are too funny!!!
I heard about those tracking wristbands. I'm not sure if it's the same thing, but some time last year I read about another kind of Disney wristband that parents can input their children's information, like their favorite character; their pets' names;
their name; age; and even where they live (I think). This is so Disney can pretty much track where you are in the park and have a character (like say if Cinderella was your child's favorite princess) approach your child and interact with them; the character would know the child's name and other favorite things, which Disney thought would be a pleasant surprise and experience for kids.
But...erm...it's somewhat cool, and yet...SUPER CREEPY!!!
There was a bit of controversy about invasion of privacy.