. . .Wiki defines it as "the ability of an individual or group to keep their lives and personal affairs out of public view, or to control the flow of information about themselves" which seems a pretty good definition and shows how government can go too far in protecting it.
The government can only infringe upon a person's rights when that person is committing a crime and due process of law finds that person guilty.
Which is why privacy can't be considered a right.
The government can also infringe upon people's rights to life, liberty, property, freedom of speech, freedom of religion, freedom to bear arms, freedom to assemble, etc. when that person commits a crime and due process is followed. Does this mean that these can't be considered rights? Of course not!