Jamming may be a Federal offence (it is illegal in pretty much every country) but nevertheless jammers can be picked up for not much money, and are used widely

Jamming may be a Federal offence (it is illegal in pretty much every country) but nevertheless jammers can be picked up for not much money, and are used widely by truckers, OCGs (avoiding surveillance, hijacking or warehouse theft, kidnapping, and especially stealing cars), even taxi drivers and couriers (and these guys are the ones using el cheapo jammers which cause lots of interference.) People facing serious surveillance threats (like law enforcement or OCGs) will have to start scanning and mapping BTLE now, which is a serious pain. The real advantage is ubiquity and deniability. I'd like to see Apple provide a way for police to identify the iCloud account owner, and other iCloud devices, for a suspect AirTag. This would significantly raise the bar for effort required for covert use. Still allows controlling boyfriends a great tracking technique though.