A lot of these problems for crew could be reduced if crew pass through as a pre-notified unit. I have had a disappointing response from the IPA on progressing this idea (in fact, sadly, very little at all from them) and BALPA do not seem to have picked up on it. It would practically eliminate the 'counterfeit' crew-member plot. Now we are left with the crew-member 'under duress' problem. As others have said, skilled profiling/obseravtion should pick out these, plus the rest of the crew, and obviously police and customs are in the same potential danger zone and need attention as well.