Chu Chu, and AED won't defibrillate you if you are faking it. It only shocks when necessary and won't always deliver a shock on a collapsed person since there is not always fibrilliation present... (as I understand it)
Sky Wave, true, but was there not an accident of this nature when the T/O config warning failed to sound because pilots had been pulling the CB to stop the 'annoying' false alarm happening on ground? (Can't recall the airline at present but there was only one survivor- a child)
Imagine if something similar had happened- config warning not working, pilots miss a step in the c/l for whatever reason (it happens) and the guy getting up to call the crew was actually the last chance to stop the holes lining up- I'd certainly rather feel dumb and be delayed 5 min than be dead!