Such a fantastic thread this, so great to see so many other people trying to stretch their brains round this. I am someone who believes that the most boring explanation for an event is usually the most sane and likely to correct but am confused by the fact that every single theory has a touch of the batshit about it, none of them sound plausible by this time of the night!
With my tinfoil hat stuck firmly to my head I would ask: in the wake of 9/11 what is to stop worried goverments adding secret 'killswitch' commands into aeroplane software that they can hit if terrorist activity is suspected. Lets face it, no-one wants another 9/11 happening on their watch and in their territory, so the plane is controlled from the ground, deliberately taken off course towards somewhere less populated, over the sea if possible, hypoxia is induced as a mark of compassion towards the victims and bam they ditch the whole lot into the ocean 'for the greater good'. Frankly wouldn't put it past any govt these dats.