MH370

I read an interesting theory by Keith Ledgerwood on Tumblr, suggesting that if someone took over MH370 in flight, they could have intentionally tucked up close to another passing scheduled airline flight (he named SIA68 that was nearby), and in their no-emissions stealth mode (except for that pesky ACARS ping), flown for hours, undetected by all the civilian and military radar along their new route. They could have peeled off when passing through an area not covered well by radar, and landed at a secluded location of their choosing. This would have had to be well planned and executed to be accomplished successfully, but it seems like a legitimate possibility worthy of some consideration.

Then I found this rebuttal.