A report has also been made recently that Google is "investigating" a fake website made up to look like theirs. A clue, should you encounter it, is that Googles own websites do not sell ad space while the fake one has ads posted.
I haven't seen any description of what purpose the fakers may have, but one would assume they're sending emails, or posting fake links, to induce people to go to their site; and it's doubtful that they have the best interests of the victims in mind.