Our Dutch pals at SWH show off what they did to remind people that you can't just bring any old thing into the Netherlands, so they should declare. One morning they went to Shipol airport with a bunch of red suitcases, with alligator tails hanging out of them, and placed these suitcases on the luggage bands. On the suitcases there was a message: "Someting to declare? Please go to the red channel" (In dutch: "Iets aan te geven? Ga dan naar de rode balie.")
("alligator suitcase" doesn't sound half as good as "Krokodillen Koffert" by the way)
