I think I know what you mean----I'm thinking you're talking about the "What are you eating" / "Post something that made you happy today" type threads..... The problem with removing that forum from "Active Discussions", is that when someone posts a "real" question like "What do you think is the best dog food for my dog?", they may not get many replies, cuz people won't know it's there unless they go to that forum everyday.
Another thing, is that if a forum is removed from "Active Discussions", I THINK that means a spider can't crawl it----and Alex, understandably, isn't gonna have that.