Outside the Centara, near the beach exit, are the usual signs saying beware of jellyfish etc. However, behind these signs, propped against the wall and facing the wall, are a couple of signs.
So I had a peek at one of them and it is indeed the one Thaihawk posted a picture of saying no alcohol to be distributed etc.
So no fake news, no porkies, no photoshopping with an imaginary white line

The signs are real but fortunately someone has seen sense and removed them from display/view.
