I'm sorry but I don't buy into the view that speculating in a rumour network on the possible causes of a tragic accident are necessarily insensitive and disrespectful. Informed or uninformed input and speculation is a key element in a network such as this, provided it does not cross the line of good taste and manners. Policing that is a key responsibility of the moderators.
If those posters who have a personal interest in the event are going to be upset by what is posted, please don't read the thread and perhaps open a separate condolences thread.