This. The first time I traveled to USA I was super nervous about customs going through all my emails, not because I have anything to hide but I want privacy. From what I have seen/heard/read TSA is pretty much a minimum wage job and they arent the pinnacle of professionalism. It is only a matter of time before this kind of mass searching is used to blackmail and extort people.
Point of clarification: TSA is not involved in border searches, that's the realm of Customs and Border Patrol. CBP and TSA both fall under DHS but they are not the same agency and there are some very important differences. TSA aren't law enforcement for one.
