My friend Rhome Anderson (aka the very talented DJ Stylus), wrote a great piece on the growing trend of DJs not handling their sound and running into the red after his week at WMC. I agree with his observations and its clear that folks are being forced to add earplugs to the usual phone, wallet and keys trifecta before heading out on the town.
http://www.vibeconductor.com/blog/2009/03/31/djs-stop-playing-so-fing-loud/