A poster which reads, "Weed ID? We will not participate" is seen in the Toermalijn coffee shop in Tilburg April 29, 2012. Tourists puffed on spliffs in the streets of southern Dutch cities and defiant coffee-shops sold joints to visitors in protest against a ban on selling cannabis to foreigners which took effect on May 1. Picture taken April 29, 2012. REUTERS/Michael Kooren (NETHERLANDS - Tags: POLITICS SOCIETY BUSINESS DRUGS TRAVEL)