You can dress like a "typical" tourist, yet be so throughly into the BM experience, with bringing valuable and enriching experiences to other BM participants that it doesn't matter, or that it functions as a wry joke or commentary.
I've done this a couple of times. One year, BMOrg came down hard on logos and 'corporate dress,' saying we shouldn't wear what The Man said we had to wear at work, so Louise and I wore Champion socks, Nike shoes, and whatever else we could find with logos protesting BMOrg telling us what we couldn't wear - what's the difference if you're telling what we _can_ wear and what we _can't_. Sheesh.
The first year the Burn happened on Saturday, I put on bermuda shorts, a polo shirt, and a golfing cap on Sunday and wandered around asking people, "Yo, d00d! What time's the Burn tonight?" It's amazing how polite the twenty-somethings were: "Oh, sir, you _missed_ it. It was last night."
"Naaah, get outta here. The Burn's on Sunday." "Not this year, sir."