The area surrounding the doomed Salton Sea is home to a singular collection of kooky characters, even by California standards. Fifty miles from Palm Springs, the “sea” is a manmade lake that was once a major Southland vacation spot and real estate developers’ dreamscape. Now it’s Nowheresville, populated by iconoclasts, free thinkers, and sunbaked lunatics. Yet they were kindred spirits, in some unexpected way, with San Francisco documentary filmmakers Chris Metzler and Jeff Springer. The duo’s acclaimed debut, “Plagues and Pleasures on the Salton Sea,” brims with affection for these freaks and their freaky, freaky habitat. Michael Fox reports for SF360.