> I'd rather be spied on by a forgien government than my own. They will keep quiet. Not among allies. If you can spy on everyone but your own citizens, you onl

> I'd rather be spied on by a forgien government than my own. They will keep quiet. Not among allies. If you can spy on everyone but your own citizens, you only need 2 nation-states cooperating to spy on everyone. Which is already occurring at a minimum between Britain and the U.S. There's no easy way to prevent the sharing of the private information of civilians without some kind of exception, and that exception cannot be precise without artificially limiting the intelligence capabilities of a country, which in practice will mean such a limit will be ignored, or, more likely, will have an easily abused exception (i.e. terrorism) to make it more or less toothless.