I think that having the volunteers wear those goggles does send the wrong message too. Yes, there are thieves and other degenerates at BM, as everywhere, and locking up your stuff and being generally safe is good. That's a lot different, however, than putting on safety gear to protect yourself from the BM attendees.
The fact that the ranger had a laser shined on her at all -- regardless of injury -- is should be the real outrage here, as most people have deep respect for the rangers and their time sacrifice. The fact that the ranger suffered permanent injury because of that disrespect adds insult to injury. If such malicious injuries become commonplace, the event should really be shut down entirely. The dream will have ended.
The attendees make the event what it is and there is an expectation that attendees are dedicated to making the event a good thing. Without that, there is no Burning Man. We simply expect better things from people at BM, and an incident like this should be considered a tragic exception. I hope it is.