I think that's why the airtags make noise after being separated from their base for too long. The problem is that you can't make a viable system to distinguish

I think that's why the airtags make noise after being separated from their base for too long. The problem is that you can't make a viable system to distinguish stalking from legitimate behavior. I have Tile trackers on various objects that I can't imagine ever taking all of them with me--inevitably that means some will be away from the system for the duration of such a trip. If one starts beeping in an empty house that simply means a dead battery, but what if someone else lived here? On the flip side, you're going to end up "stalked" by the devices of anyone you take a long enough trip with. Anti-stalking is theater.