Some people just don't care about fanart ; some don't care about esports, and some never buy skins. And sometimes, GD is just pretty much full of Red answers to banned douchebags that it gets tricky (ok, annoying) to find posts about balance or service status... So, my bet is, most of the time, people want to filter the Red Tracker.
One very simple way to do this could be to add checkboxes facing the Boards list on the left (and add a GD link, too). Here's a mockup of what it could look like. I would expect the checkboxes to immediately apply the filter to the Red Tracker when clicked, and to be saved client- or server-side, either with cookies or in the profile.