Those magic bands are evil
Read the fine print on the box and store display, you will understand that they contain active RF transmitters. They are good for about 2 years. They will constantly send out your tracking info by radio to long range RF scanner implanted throughout the park. They even have disclaimer that if you do not wish to be tracked, you should use RFID cards, as they are passive only. They can only be detected if you bring them (ie, cards) to a close proximity of the sensors.
With magic bands, they add your ride picture automatically into your MDE Photopass section without you doing anything because the scanner is built inside the seat handle. They can track which parks and rides you go to, which restaurants you visit, and how many bathroom break you take. They can even track your walking speed and real time location. They can use surveillance camera to add your video across the park if they want to.
So essentially, the moment you step into their property, they have the ability to watch / record your every step... why would anyone allow it in the first place is a question that I always ask.