So, can you get fined $1k for throwing a football or a frisbee on the beach or not?
"The Department of Beaches and Harbors told us that these kinds of infractions fall under paragraph (b). Essentially, if you're disturbing people, the lifeguard can give you a warning. If you continue, you can be fined $100. If you don't learn your lesson and continue to be a problem all summer, you can be fined $500. Big news, right? Furthermore, those fines in the California Code apply to all infractions of county ordinance state-wide, covering all kinds of actions far beyond Frisbees, and those fines have not changed since 1983, according to County Counsel."
Short answer: Only if you are being a d!ck about it.