>>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+Vb
"subpoenaed cell phone data". It's completely justifiable, legally and morally, and been happening since cell phones existed, way before January 6th 2021. The article's claim that it was somehow new to this event shines a spotlight on their agenda.