>>benwer+(OP)
> Such data may be useful, it says, to “identify every person who attended a protest or rally based on their smartphone location or ad-tracking records.”
"May"? This is exactly how the January 6th protestors were identified.
>>roarch+E3
doubtful. they were issuing subpoenas to the cell companies for their records of the tower registrations for a certain time frame when crimes were being committed. It doesn't take much to identify the owner of a smartphone via that and then correlate that with driver's license photo ids and correlate that with surveillance camera footage to bring a case. that had nothing to do with peaceful protester tracking but bog standard criminal investigation.
>>weaksa+Rd
The irony is they could have just bought the cellphone data. That's literally for sale. Maybe there was some legal reason they couldn't use it directly but it's already out there.