As had been said, Tile won't do this right now due to range, but Apple's would as the 'victims' phone would transmit onto the network the location of my AirTag.
Pretty sure they have said you will be able to turn off this feature in your phone if you don't wish to be part of the network, but I guess many will have it on to enjoy the feature.
No they won't - again it's not GPS and it's not got a mobile signal either, hell I don't think it's even on wifi. It allows you to locate a small item within a room with pin point accuracy, it doesn't allow you to stalk a girl across an entire city - although what's stopping you using a GPS tracked with a sim card for that? (Or a cheaper Android phones) those are things that could actually do it.