Answer

Who is going to enforce the rules? I'm all for keeping the beaches clean and safe and rules are needed but they have to be enforced, otherwise it is just wasted ink on paper.

The Guardians Ecológicos are the people entrusted with watching over the beaches. Up until recently they only took care of Playa El Palmar in Ixtapa. They are locally respected people empowered by the city to call for the use of public force should it be necessary. Please don't be rude to them for doing their jobs. One of them is my consuegro.