It is a reasonable point, the two things can be compared for accuracy in addition to the information contained within the various logs books carried. I'd bet my mortgage there are descrepancies aplenty and omissions of information and/or forms.
You may well (bet your mortgage), but whatever discrepancies you find whilst perhaps having something to do with pilots involved in illegal imports they will have nothing to do with a terrorist attack of the type outlined on this thread.
Do you think a terrorist is going to hire, steal or buy an aircraft in France file or not file a GAR and / or file or not file a FP, head for London and explode himself and the aircraft over the PM?
Such a terrorists would need to go back to training camp for a period of retraining.