Guys... take earplugs with you to these venues. That business of ears ringing for days afterwards might seem funny now, but when you're ten years older and the tinnitus never stops and keeps you awake and makes you want to scream, and the doctors just shrug, you'll wish to god you'd stayed off the artillery range in low orbit for the Disaster Area concerts anyplace other than inside the jet engine farther back from the stage...
Image below is from the N'awlins Musicians' Clinic. Shows decibel levels of various noise sources, length of exposure until hearing changes observed (the 12 hour limit is when the study period ended with no changes noted, they're not saying that 12 hours in the rain will damage your hearing - a bit unclear there but this was the best graphic I could find)

Here is the full web page I pulled that from:
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"I believe you find life such a problem because you think there are the good people and the bad people," said the man. "You're wrong, of course. There are, always and only, the bad people, but some of them are on opposite sides."
-- Terry Pratchett, Guards! Guards!