As a server owner, i've always found much of the traffic from planetminecraft to be people that blindly join servers without reading anything before and, asking questions that are clearly displayed on our server page AND in spawn. And a considerable amount of griefers as well.
As opposed to MinecraftForums which generally has a "better" value of server players in my opinion, they'll read before they join and dont get as many griefers from MCF.
