I think Apple needs be forced to open their AirTag platform to non-Apple users, at least for the tracking notifications. I don't have an Apple phone, nor I plan to get one, and this is plainly creepy.
GPS trackers cost like $50 and are smaller than a cell phone (thicker though because they usually have a big battery/lots of batteries). They're weather/waterproof for the most part and have strong magnets to attach to the underside of a car where no normal person would ever look. They usually come with hard-wire options as well so you can tie into a car's 12V system (depending on the car this is either trivial/fast with a vampire tap or a time consuming activity).
These devices can't be easily detected from a cell phone; it's easier to physically look for them than to try to capture their wireless emissions (unless you have special equipment). Some of them just record their locations over time and don't even emit anything at all but there's probably some that can communicate these logs via Bluetooth but I'm not sure how common that is.
Using an AirTag to track someone's car is basically ridiculously lazy and risky... Too easy for the target to notice IMHO.
For reference, most of the folks on HN could probably make their own GPS tracker with their microcontroller of choice and a ~$5 GPS breakout. Could even get super fancy to have it transmit coordinates via LoRa and whatnot. You could even 3D print an enclosure for it that precisely matches the contours of the underside of a (specific) car so that it wouldn't be found unless you were super duper familiar with what the underside of your car looked like.
- An Android app will make the "AirTag network" even more pervasive, with even Android phones doing the tracking for Apple.
- What happens when there are such "tags" all around you? How many false alerts will it take before users start ignoring it?
But to play devil's advocate, can't someone buy any cheap old iPhone (or any smartphone), activate it with a cheap prepaid plan, and use the phone itself as a tracking device instead of an airtag?
I guess the only thing special about the airtag is it's (slightly) cheaper than a cheap smartphone, longer battery life, and explicitly marketed for the purpose of tracking things. Even if a cheap prepaid smartphone can accomplish the same thing while going completed undetected.
When I was younger I had a friend who worked in a cellular phone store (back when most people went to a physical store to buy cell phones).
He very frequently got customers asking for another phone to do exactly this. It was a common problem for their commission structure because the cheap phones used for tracking people (usually spouses suspected of cheating) were often returned within 30 days and their data plan cancelled, which was a net negative for their sales stats and commission structure.