To me the more important question is - already expressed by some other posters above me - how do we (or do we even attempt to) entice those who really need that education?
This is something I've been thinking on for the last 24 hours. The best I could come up with is to disable signatures unless a required selection of courses has been completed. However, this will just create a bigger market for account farmers, and I can't see a way to prevent that.