Leaving these people to play by themselves isn't going to fix anything either. A solution to the lack of players linking in is multiboxing, yes multiboxing isn't a violation of the ToS but with our current SP system a single player can abuse and exploit the system.

Do you see those RMT running around with only one person killing while the rest only link into a leve to boost SP? Players are doing exactly that, and when you have 3 players multiboxing they only have to control 1 character each in a full 8 man party to effectively kill.