Where in the world could you land a large aircraft like this someone out of the way, where no one in say 100 mile area has any communication with the outside world?
If it's a remote area a large passenger jet will attract a LOT of attention.
Who is going to land it?
Landing a plane this size is extremely difficult even on a good runway and more importantly ILS (Instrument landing system).
ILS is a land based system that gives both lateral and a vertical signals for a planes position when landing, landing without this system is virtually impossible with a aircraft this size.
Once they've landed it what are they going to do with it?
It's not like they can strip a plane in the middle of nowhere and sell it for parts.
What about the 239 people onboard the plane, it would need a well organised and large group of people to control that amount of people, since 9/11 it's not like passengers are going to take any hijack lightly.
Final nail in the coffin for me is, how would they put out a false decoy GPS signal?
Back before the plane disappeared it was not common knowledge that the plane would ping the GPS satellite every hour, even if they did suspect this might be the case no one had written a program to crunch this raw GPS data to give a more accurate idea of the planes position.
Yet we now know roughly where the plane last pinged the GPS satellite.
Good quick assessment of what's known so far here:
http://www.bbc.com/news/world-asia-26503141
