To search my home, you need a warrant, based on a reasonable suspicion. Opening my snail mail is a federal crime. When I hire a storage box at a private company, it can't be opened for as long as I keep paying and don't store anything physically hazardous.

In the digital world, all your private files turn out to not be private at all nor is your communication. It is pro-actively scanned without cause. Guilty until proven innocent. Not just for crime, now also for "wrong speak".