Paradise Falls, located 40 miles north of Los Angeles, has long been one of the state's 'most-treasured natural wonders', but The Conejo Open Space Conservation Agency barricaded access to the attraction Friday in light of bad behavior. . . . 'While trash cans are available, many simply left it for COSCA staff to clean up and trash accumulated faster than it could be removed.' According to the organization, there were additional problems with 'human waste and sanitation as many used areas along the creek both upstream and downstream as a toilet'. One official told Thousand Oaks Acorn that people were...