Except that the NSA has, by its own admission, been gathering metadata without warrant, for some time, so it's not private, by any reasonable standard of the co

Except that the NSA has, by its own admission, been gathering metadata without warrant, for some time, so it's not private, by any reasonable standard of the concept. There are degrees of privacy, but arguably once the data has been removed from the context you shared it in, it's not private - the "moment of exposure" is a crucial concept here.