While I agree that Google is more powerful, remember that even if you or your friends don't use Facebook, many of the sites you visit do - so unless you've got

While I agree that Google is more powerful, remember that even if you or your friends don't use Facebook, many of the sites you visit do - so unless you've got pimped out tracking protection (which as a HN user you probably do, but maybe your friends don't!), Facebook still have a good idea where you're moving throughout cyberspace