NSA tries to develop patterns of info & link that to certain people or organizations. They do the same thing with YAHOO.
Depends on how you look at it. The US Government uses Google as an informant. But I don't think that makes Google a spy agency. Just a tool.
Facebook do to spy on people. Thats how they make all of that cash. Selling it to the government. Which is also how they try to crack down of sex offeners on facebook
Who really knows? But for finding things on the internet just google it.........!
No, of course not.