M&V
Basically you have answered the question. i.e.
a. It is a problem
b. There seems to be no ready solution short of external surveillance.
c. Airbus seems to be unconcerned
d. passengers must watch out internally for terrorists and externally for flutterbugs, flibbertygibbets and instant excrescences.... and be ready to intervene in each instance. (This should be written into the passenger briefing card: "Pilot will be unaware of any bits shaking off the airplane so please annotate, sign and tear off the notification card at the bottom of this page and send directly to the pilot if you note any parts coming adrift or shaking violently")
e. A reward system should be in effect for any passenger "saves".
M&V
Would you have some idea of the date of this Nimes incident (or failing that, the year pls?). And thanks for your able assistance.