We now know that the determined terrorist is prepared to martyr himself for the cause. Therefore the presumtpion that bags in the hold belonging to a passenger on board are safe no longer applies.
Charlie, u are right of course.
I dont think anybody would say that just because a bag in the hold corresponds to a pax in the cabin that this means it is definately safe.
However an unchecked unaccompanied bag is still definately more of a risk.
At least the b**tards know that they have to travel with the bomb now!