Why not allow one the option of deleting one's post as long as it's done, say, within 10 minutes of posting. It would be helpful in the event one changes one's mind or unintentionally posts a duplicate.
It's better this way, mobius. This way, they *learn* not to double post. Also, I'm not sure if such a time-based rule is possible in the forum software...
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.