I pointed out that it is a theoretical risk, and I don't particularly want to test the theory. The point is, one or two inadvertant or deliberate lapses is one thing, if there was widespread use of tracking devices for luggage, that would be another. The wifi which is installed in some carriers is shielded and operates differently to the uncontrolled transmitting devices used in blackberries and mobile phones. If you go on PPRUNE you will find in the technical section specific cases where interference has occurred.
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