Facebook is prepared to drop a cool $19 billion in cash and stock to buy Whatsapp, but it won't actually get to until both companies gone through a regulatory rigmarole. Part of that process involves getting the blessing of Europe's antitrust crusaders and according to the Wall Street Journal, the European Commission wants to know just what sort of impact the merger will have on the companies' competitors. Its plan to find out? Sending them, erm, questionnaires. The list of rivals that have been asked for input hasn't been disclosed, but c'mon -- does anyone expect them to say "Oh yeah, the merger's cool, we'll be totally fine"?