CasperOne's answer to Request to add a tag info page has reminded me of something I wanted to ask.
As there's no point creating tag wiki's for non-existent tags and it could lead to extra crap (technical term) coming into the system why not ban it altogether?
To quote from casperOne's answer, which gives a better description than "crap":
Because this tag would not have any actual questions associated with it, there's no reason to create a tag wiki for it.
Additionally, giving it a wiki would probably encourage people to actually start using the tag, and that's not good either, as the tag is undoubtedly a meta tag, which is also a no-go on the site.