There are a handful of active lolcows that are not only connected but also provide a distinct niche.
To add, I think a few of Phil's disgusting friends could be migrated from the crustpunk fandom/general to the ratking as well, but that's more of a personal opinion.
The interesting thing is that there are multiple rat kings. People are correctly identifying that people XYZ all know each other and act together, but they're not apart of the rat king that Cogsdev/Laurelai/NekoArc are -- the tranny "converted troll" SJW. If we had our own subforum for this, we'd have to use thread prefixes to group ratkings together.
We have now hit our 10th rat king thread today already and I foresee more coming as the weeks go on. I would say give it another week to see how it turns out and then give the subforum a trial run. If it backfires, just send all the threads back to Lolcow again.
I think it should be reserved for people whose main claim to fame is being connected to one of the rat kings, not people (like say Brianna Wu) who are more famous for their careers, crimes, or other clownish behavior.