DoD: Turn Off Your Fitbit, Garmin, Apple Watch GPS
I occasionally did onsite support many years ago for some weird proprietary equipment.One military site had the rule that nothing electronic left the main gate site without being handed over to the guards, processed, and i believe destroyed before it left (not that you ever saw it again anyway).   They were serious...You drove to the site knowing it would all be gone and a strong warning not to turn around if you were near the gate because you just remembered you had your phone in your rental car.We went through a lot of equipment.But that site as far as anything I could have done, secure.  I don't even know what the faculty looks like as it was blind folds and guards all the way to the equipment (well you could see the bathroom....with an MP.. there).I feel like those kind of policies are the way of the future.  There is no other way at this time.