Also that customs, maf and erma do not with make or change the rules.

And if he had brought something in and it got out and caused problems then everyone would be annoyed that MAF wasn't doing their job right.

Why not make sure someone they see as a potential risk aware that they are being watched and therefore less likely to try bringing something in illegally?

It takes five minutes to get someone to turn their pockets out and have a dog sniff their bags. My guess is these guy's had a quota to fill and it was a slow day