I haven’t had it on a plane, bus or train come to think of it. Only ever in the car - Google seems to be able to easily tell if I am in a bus / train or car so perhaps apple can too and only raises the alert if you’re in a car - which makes sense.

Not related to AirTags actually but the find my network also alerts you to AirPods that are travelling with you but aren’t registered to you or your family sharing plan. So whenever they get in the car with their AirPods I get the same stupid alerts, every damn time.

Doesn’t help me, my phone is a work phone so I cannot invite my kids to family sharing. Every time I travel in the car with them and their AirPods my phone tells me someone is stalking me.

You can only suppress it for 24 hours. It drives me mad as every time I have my son in the car it tells Me someone is tracking me.

I believe if they are part of your family sharing plan you can disable it but my phone is a work phone so I can’t create a family sharing plan and add them. It’s super annoying because you cannot dismiss the alert unless you click on it and let it open the app and show you the map.