So your goal is to separate members. Well then your goal of making the Oekaki Board 2,0 is gonna become true.
Having the site already separated between forum, site, oekaki and gb will make even more awesome making another way to separate its users.
If the people complain because people go to the GB just to talk, then they are being egoist, the gb is for every member to do what every they want (not destroy other peoples work and with some subject regulations). So they are the problem, not the people who want to talk to others.
If the GB doesn't have the capacity for X quantity of members or something like that, then talk with Rio to deal with the subject. So stop being a retarded mod, and evaluate the situation and if you don't want people to disagree with you, don't post on the GD section.