JD80
Premium Member
Nearly every attraction has long range readers scanning every guest with magic bands and Bluetooth enabled phones at various points throughout the queues. If you’re wearing a magic band they know what time you entered the queue and what time you boarded/left the attraction.
Just thing how many errors this could involve and you'd probably need people to actively filter out a lot of erroneous data just to get an estimated wait time that they probably have other ways of doing it anyway.