Direct link to the research paper: Link

carry wifi jammers in public

you'd get a visit from men in suits very quickly lol.

privacy is essentially dead. the soviet union could only dream of the surveillance capability western nations have today, we just have to hope western governments stay relatively permissive of 'non-conforming' behaviour.

Useful. Hostage situations. Raids. Military. Espionage. Right now they can see people but not enough to iD fruend/foe. Many benefits.
Now we can watch your face when you jerk off in your room to cheese pizza.