I seriously doubt that even when people are protected by US law against the NSA, it doesn't have a significant effect on the NSA's behaviour. Because they're a

I seriously doubt that even when people are protected by US law against the NSA, it doesn't have a significant effect on the NSA's behaviour. Because they're a government agency, they can pull the 'terrorism' / 'national security' / 'children' card pretty easily, and any serious challenge can be tied up in court for a long time while they continue doing what they're doing.