Beyond Reason

The passenger of the Turkish SunExpress plane which made an emergency landing in Greece because of a bomb threat, was released after being questioned by police at the Adnan Menderes Airport in the western province of Izmir.
The plane bound from German city of Stuttgart to Izmir with 62 passengers and 6 crew members on board, made an emergency landing at Thessaloniki after a crew member found a threat written on mirror in toilet with a marker pen reading, "bomb. We are going to die today".
The passenger was detained after police found a market pen with the same color of the threat note.
He denied any wrongdoing and said that he always carried a market pen in his bag during his interrogation.

http://www.worldbulletin.net/news_detail.php?id=53082

Why would anybody do something like this?