I'm a LiveJournal volunteer helper, in charge of the documentation side of things (such as it is). Most of the people who currently help with that come from LiveJournal technical support and know what users are asking and what's missing from the FAQs, and we can write decent answers to specific actual user questions, but whether for lack of time, inclination, or skills, keeping FAQs current and fixing the flaws we find in them is harder (although we're fairly good at spotting possible improvements based on users' reaction to the FAQs).
In short, we're not technical writers, and it shows. (Although I spotted a familiar name on the community profile. *waves at bridgetester*) If anyone of you is interested in pitching in, or pointing others at this, comment (or poke me), and I'll set things in motion.