This piece offers one of the best single sources of information that I have found that covers a broad spectrum of issues related to our ruling class's surveillance programs and methods including the integration of corporations with government spy agencies, legal challenges, implications for activists, etc. It is loaded with additional links to other sources for more specialized information.
Regan starts off with a caveat:
...there is no absolute protection against surveillance. You can make it extraordinarily difficult for people or technologies to gather your data, but no protection is absolutely impassable.However, later on she further clarifies this statement:
...there is no absolute protection against surveillance. You can make it extraordinarily difficult for people or technologies to gather your data, but no protection is absolutely impassable.