[buffington]

Maybe? Not my cup of tea, but if I didn't trust my wife, and she allowed me to track her, maybe that'd solve whatever hypothetical problem we were having. Very unlikely, but I don't think the idea itself, doomed to fail or not, is a problem if both parties consent.

Which is what you do when you work for an employer that wants to track your entries/exits into their buildings. You consent to allowing systems to be put in place that serve as placeholders for when trust isn't yet or won't be established.