I think the backlash is going to be greater than the USG anticipates. One thing that engineers can do is to simply refuse to work for the US government, or leave if they already work there. Deprive them of talent. Stop them from recruiting on college campuses.
There's a precedent: the campus campaigns against Don't Ask, Don't Tell. The NSA of course has its own very unique interpretation of "Don't Ask (for permission), Don't Tell (what you're recording)". But it's probably just as worthy of censure.