I think its all hit or miss. Depends on the person checking whether his boss is stressing him for busts, depends what you look like. If you're stepping up looking like the Late Rich Piana (RIP), after finding a vial, script or not, they're looking into your shit a little deeper than someone that looks athletic. It's what you're willing to risk. If the country wants to be assholes, you miss your connecting flight or get detained for a few hours while your girl is waiting outside customs. All depends how much frustration you're willing to put up with just so you don't miss a few weeks of shots.
It may not be serious to us, but you get someone that's looking to make a name for himself, things can get inconvenient.