Posesionarios de Terrenos de la Salinas?

Over on Jose Morelos, atop (I think) the dried-out dredgings from Las Salinas, there's a group sitting under a large tent that has banners proclaiming:

"Colonos de la Salinas de Zihuatanejo A.C."

and

"Asociacion Civil de Posesionarios de Terrenos de la Salinas"

Que pasa?