Yes but if you are becoming disorientated you only have 30 seconds to do it. Then there is the fact that masks as opposed to hoods become more ineffective the more rapid decompression is, followed by a need to breathe in a certain way. Lastly there is only a limited amount of oxygen for...
Bear in mind that a rapid ascent would probably cause death within 30 seconds and the answer is no. In addition in the time leading up to death the brain becomes confused and disorientated.
Radar can still see the plane but no longer knows who it is, remember the Malaysian military picked it up when it crossed the Malacca Straits. From what I have seen Air Traffic Control relies on tracking a plane across a predetermined route, it knows the route it will follow.
Seen a few theories about this:
1. This was the point where there was a struggle in the cockpit.
2. Radar avoidance.
3. If there was a fire then climbing this high would reduce oxygen that fuels fire.
4. To kill all passengers on board - doing this would have removed all of them within 30...
Reading that pilots rumour website they note that the authorities are saying it was disabled, the inference being that it went through a sequence to do so. Similar in theory between a PC being closed down and losing power due to a power cut - when you switch back on after the latter it asks you...