It'd be more interesting to use 2 AirTags, and try to figure out when the owner is away from the car, e.g. if you can see them take an Uber to the airport and their car is in the driveway.
To turn on my criminal mind: you driving around neighborhoods: a witness might notice you cruising around a few evenings ago and note your license plate (you'd have to go at night because during the day the cars wouldn't be there, you might have to go a few times to see what cars are available).
The AirTag/any tracking device is quite ingenous, just go to the mall carpark (no one will be suspicious, it's just someone at the mall) and have a better selection of cars at one place, plant the AirTags (riskiest part) and then wait. Even if they found it at home, you already know where the car can be found, and if you're worried the cops might be waiting, just wait a few more months, statistically the car will still be there.
To turn on my criminal mind: you driving around neighborhoods: a witness might notice you cruising around a few evenings ago and note your license plate (you'd have to go at night because during the day the cars wouldn't be there, you might have to go a few times to see what cars are available).
The AirTag/any tracking device is quite ingenous, just go to the mall carpark (no one will be suspicious, it's just someone at the mall) and have a better selection of cars at one place, plant the AirTags (riskiest part) and then wait. Even if they found it at home, you already know where the car can be found, and if you're worried the cops might be waiting, just wait a few more months, statistically the car will still be there.