I'm planning a trip in a few weeks and there's confusion between the members of my group over whether we can switch MagicBands and go on the Fastpasses of the others. I don't think there is any way to tell who's who if you have the same bands, but I am aware there is the RFID chip in them. Does anyone know if the bands can be switched? Also, if the Cast Members can tell which from which, do they say you can't go on the ride? Thanks!