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
This type of achievement is how a lot of systems work. My Fitbit (hi-tech pedometer) is the one that comes to mind most readily.
It is kinda like lifetime achievement badges. On my Fitbit, it tracks for lifetime numbers of steps, lifetime staircases climbed, most steps in a particular day, and a few other things. Getting badge is a small ego boost and encourages continued participation.
I know the achievements system exists, but I don't know a whole lot about it. My $0.02 is a small thing like lifetime tracking is a nice little ego boost, and if we can be given the option to make it public or not, so much the better. As long as the achievements are achievable for the common Soyler (so as not to discourage those of us who lurk and occasionally post), it might be worth looking at.