Please !Get off the motorbike when come in the theatre

The Annals of Improbable Research, home of the IgNobel Prizes and the Luxuriant Flowing Hair Club and delightful scientific research such as Is Kansas flatter than a pancake?, are currently collecting entries to their Prohibitions Competition, with signs such as:

link to some very nice signs

Weird signs, anyone?

My favourite sign here in our town was the one the City Gardens used to put up in winter on the tulip beds:

:smiley:

I’m not sure if this is what you are looking for but here is a link to more than a few weird signs.