The website was hacked just after a day of the leaks from Edward Snowden which said that NSA targets Angry Birds to collect end user data.  Though The Developers of the Game said in a press release that they are not involved in any such activities, “Rovio Entertainment Ltd, which is headquartered in Finland, does not share data, collaborate or collude with any government spy agencies such as NSA or GCHQ anywhere in the world.”. It is possible that The Company might have been a victim to The NSA’s Surveillance program without being noticed by there team.

Official Website of Angry bird hacked and defaced by Anti NSA hackers   TechWorm - 81