I don't see how bitching (if I can use that word) in a how-to FAQ serves any constructive purpose. It doesn't help people who want the help. It doesn't help the people trying to work on the forum system. It doesn't help anybody at all. It is destructive rather than constructive.
I sure don't want to point people to a complaint thread when they ask how to use the search features. And typing the existing solution over and over again defeats the purpose of a FAQ.
There's plenty of room for bitching here in the Complaints Department.
[Edit: I guess I'm a naughty boy. You probably guessed the word I was using anyway. It seems to me that your complaint in that FAQ is perfect for the old "Report Spam" thread, as poorly named as it apparently was. If inappropriate qualifies for the old thread, that is.]