A long time ago in SE Asia...
Cabin Chief was stopped in customs in S'pore and his bag was searched...166 SQ give-away pens fell out on the counter, much to his embarrassment i'm sure (he was sacked)....
If any flight deck crew member is so inclined to depart the aeroplane with company property under the present tight-fisted environment, they have only themselves to blame if they are caught.
Simple as that...