I'll give a shot at trying to interpret what the writer was meaning to say:
"There are people on the board who should post less and lurk more. There are people who have no actual interest in serious writing but who ask serious questions anyway."
First sentence explained: there are recurrent topics and stickies scattered through the forum, so a little bit of exploration can answer a lot of common questions about the craft and the industry, hoping to diminish loaded and already answered questions such as "ow do i get n agunt lol?" - although it is a perfectly legitimate question, it's also one for which an answer exists and can easily be found, and asking the question again in a topic of its own only clutters the forum. So the writer is probably trying to say "When you sign up, take your time, take a good look around and get your bearings. Don't jump headfirst and ask for the map when it might be right in front of you but your head had been too busy charging ahead to notice."
Second sentence: among our members are those who pursue writing as a casual hobby, or who write but with minimal effort compared to the average. Of course, there is no rule that dictates what one is to do with his knowledge of the craft, but it remains that it's a bit disenheartening to answer the questions of one person and at the same time fully knowing that he will either disregard your advice or quite simply forget to check back on the thread. Such events are relatively rare here as far as I know, but I can't help but exclaim a "Meh..." whenever I recognize such a thread - chiefly among them being those written bi 1 hoo writez liek dis, kind of like someone asking you a firearm question while he's merrily chewing on the business end of a loaded pistol, to whom it's best to remain quiet and nod your head rather than tell him in his face that he's doing it wrong.
In the end, it's simply an outline of the things that happen on any forum at all; not just AW.