Actually it would be censorship by the very people who have the right to censor. The community. If the community votes to have a thread removed to "argument land" then it should go there and all who want to read it and those who want to continue the fight can go there and do it.
Many other websites are self-regulating in this manner. Digg for example is a place where content is displayed according to the voting of it's user base. But no content is lost.
I don't go to NPR because I don't want to fight about non-pool stuff. But I will not allow folks to make what I consider to be ludicrous points without answer on the main board. If the thread about McCumber for example were moved to NPR then it would go where I don't care and would not follow it. IF we had a voting system in place then I am sure that the community would have voted it off the island already.
I vote for a voting system!

In full knowledge that I will probably be the first one voted off.........