Lack of debris and communication aside, the sheer frequency of Asian airliner disasters and disappearances this past year has been especially provocative and unusual. The Ex-Prime Minister of Malaysia has resisted implications that the plane had crashed, insisting that MH370 was a CIA operation. The loss of the plane over the Ukraine, too, stirred up rumors of a hacked plane being used as a missile and also rumors that it was taken down by US Air Force to as a reputation tarnishing campaign and pretense for military action (plus countless others).
There's just not enough real information to gain certainty, and the number of plausible sounding theories create a cacaphony.
But one thing seems certain. The series of unusual, '(in)convenient' (a plane full of AIDs reseachers!) and mysterious circumstances have triggered enough minds to where is not controversial to conclude that something unusual and extraordinary is going on. I wonder if we'll ever know.