I don't see scum doing the malefactor hunting bit out here in the thread like that. It's not an action that I think they would think to do to get town read.
I imagine there is discussion on who it could be in scum chats, and I could see scum doing it to discredit someone.
But Keeper did it both in the thread, but also subtly / without attempting to convince others or divert people away from listening to flavor leaf. The comment about a "5th of this games posts" meaning they thought flavor leaf was the malefactor was missed by Dunn when reading through the thread normally until I pointed it out for him to see the posts in succession in their iso.
This feels more like town working through their thoughts on the malefactor then scum action to me.