mark zuckerberg f8Facebook stirred up privacy concerns when it
came out that its "Like" and "Share" buttons appearing all over
the web actually report your visits back to Facebook servers.
Keep in mind that Facebook isn't tracking your entire browsing
history, just your visits to sites with "Like" and "Share"
buttons.  Bejar told USA Today that Facebook technically could
link your name to your logged-out browsing data, but he "makes
it a point not to do this."  Why does Facebook gather all this
info and what do they do with it? By keeping so many details, it
makes it easier to identify fake accounts and scammers. By
keeping track of what users "Like" around the web, Facebook can
show people ads that will be the most interesting to them and
generate more revenue.  Despite Facebook having the best
intentions (or at least saying it does) -- wanting to maintain a
high quality user experience and generate ad revenue -- you can
see why privacy experts and informed users are concerned.