Facebook became the latest American technology company to face antitrust hurdles in Europe after the German Federal Cartel Office (Bundeskartellamt), a competition authority, opened an investigation into whether Facebook Inc., USA, Facebook Ireland Limited and Facebook Germany GmbH abused their alleged dominant position in social networking by violating data protection laws. Accordingly, unlike other proceedings the Cartel Office’s investigation targeting Facebook is for the first time based on the potential invalidity of its terms of use pursuant to German data privacy laws.