The FBI, to investigate the attack on the Capitol, has seized call records and "actual communications" from portable phones of everyone there.

I think that is legitimate in response to a crime, especially a heinous crime like that one. The majority of the people there were engaged in insurrection.

What we must fight against is the establishment of systems that collect data about people in general when there is no reason to think they are engaged in a serious crime. That is fuel for tyranny.