If it's worth saying, but not worth its own post, even in Discussion, it goes here.
LessWrong's worst posts:
http://lesswrong.com/r/all/top/?count=2811&after=t3_327
The most heavily downvoted post in Less Wrong history is actually not on that list. Curi's "The Conjunction Fallacy Does Not Exist" was removed by Eliezer on the basis of it being massively downvoted and too stupid to productively discuss.
If it's worth saying, but not worth its own post, even in Discussion, it goes here.