Looks like it's time to generalize this script so we can apply it here...

I seem to be thinking a lot about voting today...

How about a negative rep. threshold at which point a node would be moved to a delete bin, and from there deleted entirely if it receives no ++ at all? I don't want to overcomplicate voting and the associated accounting, but as this place gets bigger and better known, I think the management will need more and more automated garbage collection tools.