Unexplained Naked Man

There is a lot that goes on here that goes over our heads due to language.  But this one is the biggest mystery.  There is an ecologic area in between the city parks and the River (Rio De La Plata).  We were hoping to walk out on the trails there,  but found the gates all closed.   But there was one man sitting in a lounge chair reading, naked inside the gates.  He never looked up or acknowledged the periodic passerby looking to walk out in the reserve.