It would amuse me if this were done, and (as seems a likely consequence) LW participants who dislike the average level of quality in the Main and Discussion sections started having their rationality discussions in the Off-Topic section, where the discussion exclusively comprised people who have a track record of making comments the community finds (on balance) valuable.
It would stop amusing me if this were done, and (as seems a likely consequence) LW participants who feel deprived of their presumed right to participate in the Off-Topic section despite lacking such a track record start gaming the karma system so they can defeat the mod-boss and advance to the next level.
We are the reason we can't have nice things.
Ah, but perhaps there a simple fix for this: posts that would be on-topic for LessWrong are off-topic for the Off-Topic section. (edit: didn't see komponisto's comment)
Petition: LW should introduce a dedicated off topic area
Why?
1) I want to discuss various topics with people who are both intelligent and rationalist, and i know of no other place where to do it.
2) If find that rationality is getting boring in itself. I need to use it on something.
3) As stated in this comment http://lesswrong.com/lw/btc/how_can_we_get_more_and_better_lw_contrarians/6e3p
the narrow set of topics might actually hurt LW by driving good rationalists away.