Implement a Tag Black List
I recently asked a question about how to re-request a retage
It stemmed from the fact that despite Visual-Studio-2008 being the preferred tag, VS2008 was still being used.
One of the comments on this question mentions that "autorenaming" is better than tag aliasing. I'd agree with that.
I'd love to see a dictionary of unsuitable tags and their associated acceptable tag.
This list could be managed by either moderators or 10,000+ level users.
I'm not sure if the auto-rename should occur after the user types space or after they press submit. I think that it should display a notice mentioning that one of their tags was autorenamed.