Now i've heard it all!!!
When i picked myself up off the floor after the bout of laughter,i realised what sad,skeptical,paranoid people there are about,and it's actually scaring me.
If a terrorist has the ability to make a "barometric trigger device",do you really think he would have no clue what height an airliner flies at? Astounding!
Secondly,as a pilot,you seldom are guaranteed to get your requested Flight Level,so that info is of no use as there is no way to predict what LVL a flight will be given.Please,don't try to look for "terrorists"behind every innocent and often valid question-its really so annoying and quite narrow-minded.Have a bit of faith in the established security procedures at airports to root them out.