I've heard various ideas such as limiting it only after mods have expended their points (this will require implementing a cooldown to prevent a user from getting points again too soon). I want to hear your feedback, and I'll roll together something for the next major update of the site. Leave your comments
++, figure we can cache the value if need be in the database. We can write a slashd check to generate them retroactively by walking the parent on every comment to generate a thread id (which we can pin out somewhere on the comment bar). A good way to limit moderation to specific threads.