This sign was pictured in Namibia, the former German colony in South West Africa.
I don't know the setting, but isn't it reassuring to know that "kein pinkeln" is an instruction I think most of us could follow...
I suppose rather than guidelines or a request, it could also be a sign next to barrels of Carling just to reassure the punters. if so, it could be our humanitarian duty to export some Brains Beer to Namibia asap.
It might help their rugby supporters (if not their team) in the morale stakes.