I don't think, if you want arrest somebody, you would crawl everything as a part of acquiring evidence before it.
It's about terror and control, not about justice. If you think that's bad wait till you see what the Khmer Rogue did in Cambodia. The precious framework of individual rights, a relatively functioning justice system, and constitutional guarantees may not be perfect here in the US of A, there are issues, and those rights are still being eroded, and we have work to do, but people who draw comparisons between places like the US and China or Iran clearly have no idea what they are talking about, and it's a decent chance they may in fact be part of state sponsored psychological warfare apparatuses.
It would also prevent their account being used to access any private accounts they may follow.