I've never heard of this or the burning man festival. I checked out your link and googled a little more about it to get a better idea of what it's all about.
Seems like it's a bunch of people running amok and using the concept of "freedom of expression" to exploit others and act inhumane. Least that's what came to mind when reading about it.
Is there more to it than that?
It's a hippy dippy thing, that got it's start
on a beach in California, then moved to the
Black Rock Desert in Nevada.
Amazingly enough, it gets bigger, and goes
downhill at the same time.
It's basically 'Woodstock', for the mentally ill.