For those that would like to know more about Coast Guard Rule 6, as well as other waterway regs and explanations,
http://www.navcen.uscg.gov/?pageName=navRulesContent
I think you'll note that the USCG does not promote BUI on the water
And the official USCG safety site.
http://www.uscgboating.org/
Rules.
http://www.navcen.uscg.gov/?pageName=navRulesContent