Q: "Can Mark Zuckerberg see everyone's Facebook?" A: Probably. Information shared with Facebook is likely viewable by Facebook's highest ranking executive. (Does he have the time or interest? Probably not.)
Q: "Mark Zuckerberg is a CIA agent." A: No! (At least, we're pretty sure.) Despite what The Onion says, the popular social network is not a government surveillance apparatus, and its founder is not a "decorated agent codenamed The Overlord." Though we think that would look pretty snazzy on business cards.
Q: "Why is Mark Zuckerberg a robber baron?" A: Despite a conspicuous lack of legendary facial hair, as is typically seen on the 19th century industrialists for whom this term is usually reserved, Zuckerberg's net worth is estimated to be an eye-popping $19 billion. (Whether you deem that to be from "plundering" and "swindling" is up to you.)