A scarily plausible one is that this was a dry run, to test responses throughout the region to an airliner behaving in an atypical fashion.
There also exists the possibility that someone is trying to get someone else to show their hand by revealing technical means that can locate the plane.

Mark
G68, baby Genelecs, Humax Foxsat, Oppo+Vanity93, Toshiba HD-A35, Pioneer CLD-925 + Meridian 519, various other random bits and bobs
Got a black G08.2 you want to sell?