Not when it's something held in a national park like this. It's an organized camp site not a festival. And they are required to ensure it is safe within reason, and it seems like they did that/are doing that.
Pretty sure there's going to be more than a few against the organizers, and maybe the authorities for allowing it to go through despite the forecasts and not getting people out fast enough. Which is ironic considering the general (or at least loudest) philosophy of Burning Man goers is one of laissez-faire techno libertarianism