Stalkers are using AirTags to track people. Apple will warn you if someone is tracking you with an AirTag, but only if you allow Apple to track you — all the time, for certain. (Tracker Detect surely works by telling Apple where you are — and what more data does it send?)

That does not fix the problem, it just replaces one tracking system with another.

Making the AirTag give a sound is a step towards a real fix, but it should also give off radio waves that allow you to find it using a portable radio receiver nearby to get a fix on it.

A real solution would be to require AirTag-like products to emit radio waves that one could detect with some non-computerized receiver.