I am talking about the usernames of the form user******
assigned by the system. They can be quite confusing when multiple users with usernames of that format participate in the comments. Yes, a member's username is his own business and no it's not the end of the world to spend a few extra seconds to check the names more carefully, but it's still somewhat annoying.
What I propose is to prevent reputation progress when the user reaches a score of 10, that's when he or she can create new wiki entries. A limit on 50 or 100 would work equally well as long as it gets done. Of course the pending reputation will be rewarded once the new name is set.
Another solution would be to reward a badge for it, as a new user I was going after them and I suspect many new users will (Jeff Atwood even wrote about it).
At this point I'm neither for nor against this system. Even to me it does sound a bit... well... authoritarian. What is your opinion?
Edit: This came up in the comments section of my answer in a question. The two other participants have now changed their aliases.