it's a concept. Some boards go into the doldrums for months and then pop up....if a Mod is an active member and there's nothing to post about... but has to post a blah blah post to remain active.... that isn't an improvement, imo.
Now if the Mod has a doldrum board in their favorites and doesn't even read new posts....that would seem to be a better criteria to base removal on.
If a board is that dead, it makes just as much sense to remove the board and its posts which isn't likely to happen. So what harm does it do to leave a doldrum board & Mod intact?
My opinion is just that, my opinion. So make no investment decisions based on my opinion.