It's kind of impossible. There would always br some kind of rules in play, be it don't kill anyone, don't mess with other people, or even just something like manners of any sort. Plus, it would be likely fighting would occur, and soon enough you've got sides... And a war... Gangs, mobs, etc.
Unless they settled things completely, but... I don't know. Anarchy is kind of impossible with large quantities of people. Maybe if there weren't so many people anarchy could work.
Why would you start a thread like this if you didn't want any arguments?
He wants to sit back and eat popcorn, while watching everyone else argue over it. In other words, he wants to turn this thread into an anarchy. *rimshot*