In the 1700s, the only way for the government to read your papers was to take them away from you--harming your use of them.
Today they can extract the entire contents without disturbing your use at all. Reading and restriction have been separated.
It's a new situation and there will be big fights as the law catches up. This is not historically unprecedented though; technology has frequently caused disruptions in the law. That's how copyright came about, for instance--the printing press meant that original content was no longer protected by the need to hire 100 monks to make a copy.
