> Apple’s Unwanted Tracking (UT) alerts show a notification when a suspicious device is detected moving with the user for at least 840 meters and 10 mins. [...] This suspicious lost device must be an AirTag or AirPod that is separated from its owner and broadcasting rolling public keys.

So if I turn my phone off and get onto a bus or train with a tracking tag, other passengers will get an alert?

Also, the wording indicates that the tag needs to be marked as lost. But could that be used as plausible deniability -- that someone had stolen it -- by a person engaged in illicit tracking?