Server 3, 4,5 and 6 are PVP too. So everyone choose where to buy/sell items and stay afk. If you have dinner time you would let your account online for a while right, instead logging out from the game.
I don't think we would disconnect anyone from the game for afk. It's like skype admins to start disconnecting you if you are afk and you don't chat with someone for 15-20minutes just to prevent their servers from crashing or lagging.
By my opinion and view there is place for everyone in the server. If you want PVP server without many people just go in server 6, because it's a new server, there is no afkers at all, no one uses /post frequently and maps aren't full with players.