Well this isn't creepy at all.
While the addition of USADA drug testing has largely been a positive change for the UFC, one of the downsides is the burden it places on the promotion's 600+ fighters. Not only do they have to be ready at any time to submit to random drug testing, they need to keep USADA up to date on wherever they are. If a fighter isn't where they say they're going to be when USADA comes calling, they get a warning. Multiple warnings can lead to a suspension -- something Nick Diaz is currently facing.
Now, USADA is considering simplifying the tracking process by adding a tracking feature to an app fighters would have running on their phones. Welterweight fighter Sean Strickland shared a survey sent out to fighters that floated the idea.
The idea has its advantages: It takes the burden off fighters needing to constantly update USADA of their whereabouts and consequently makes it easier for USADA to do their jobs.
That being said, it's a pretty huge invasion of an athlete's privacy. As usual when it comes to overbearing policies like this the UFC sometimes tries to enact, we'd like to remind you that UFC fighters are technically private contractors and not employees. There's supposed to be a pretty clear limit to what the company can ask from private contractors, and call me crazy but I think tracking their whereabouts all day every day may just be past that.