They Know if You’ve Been Naughty
Not everyone who visits the happiest place on Earth is, in fact, happy. A lot of visitors get grumpy (not the dwarf) for various reasons – tired of waiting in line for a ride, kids are crying, wasn’t able to get a picture with a particular character. The list can go on and on… And unfortunately, these guests take it out on the poor cast member who was nearby.
But according to former employees, taking your anger out on them is not a good idea. They leave notes on your reservation that gets uploaded to their computer records across all sites. So if you displayed really bad behavior during your last visit, the people who scan your magic band know immediately.