Edit: looks like it doesn't start beeping for three days (though Apple can change this server-side if they decide three days was a bad choice), which seems like way too long. A stalker could probably make good use of this in just a few hours, let alone three days.
The stalking potential is greatly reduced if the victim has an android as the location will only be sent when its detected by an iphone.
If the stalkee has an android they will never know. Their position will be snitched by every iDevice they come near.
"Lost devices. Devices that determine to be in a lost state start sending out BLE advertisements with a public key to be discovered by finder devices. Devices are considered to be lost when they lose Internet connectivity.
Third-party accessories [6] are small battery-powered devices that can be attached to a personal item and are set up through an owner device.
Accessories are determined to be lost when they lose their BLE connection to the owner device. Finder devices.
Finder devices form the core of the OF network. As of 2020, only iPhones and iPads with a GPS module are offering finder capabilities. Finder devices can discover lost devices and accessories by scanning for BLE advertisements. Upon receiving an OF advertisement, a finder creates an end-to-end encrypted location report that includes its current location and sends it to Apple’s servers."
Elsewhere, it is clear that this operates even when flight mode is enabled.
If you can't stand criticism of Apple, please fuck off back to reddit and fanboi there.