Usually, I would say that we just have to wait for some sort of wake up call, something the US government fucks up so incredibly that anything involving surveillance of an innocent populace is a poison pill.
But we've already had the Snowden leaks, and if that wasn't a wake up call, I don't know what else could be.
The next logical step is death squads, drone surveillance (and strikes?) and kidnappings on US soil, not just abroad. I hope it won't come to that, but I fear it will. Maybe not until 2050 or so, though.
Judging by current operations abroad, and historic evidence, like who and how Western Hemisphere Institute for Security Cooperation (WHINSEC) (Nee School of Americas) have been training and for what, things like COINTELPRO -- things are looking grim.
[ed: not to mention the lack of consequences from Snowden and the CIA torture report -- there doesn't appear to be even a thin veneer of acountability left.]
But we've already had the Snowden leaks, and if that wasn't a wake up call, I don't know what else could be.