I would add that incidental collection is still a problem -- and should the police be able to know the identity of every person in the area of a suspect? What a

I would add that incidental collection is still a problem -- and should the police be able to know the identity of every person in the area of a suspect? What about journalists? John Doe warrants? If should really be specifically enumerated with no slack. As in, surveillance footage keep for maximum of 1 hour (on line detection only, not historical movement search); only warranted faces will be produced in report, others people blurred. Also, having unopposed, indefinite warrant applications is bound to be troublesome. Who is checking the validity of police statements? No one. If the police want the surveillance warrant to remain secret indefinitely there should be increasing levels of review. Likewise journalists, politicians, lawyers, medical data, etc.