<p>I've just spent a few hours re-tagging a few hundred questions on serverfault.</p>

<p>Mostly this was to remove 20XX tags, and as they can be ambiguous (eg SQL 2008 vs Windows 2008, etc.) there's no easy way to automatically re-tag, but it makes sense that people create them.</p>

<p>It would be great if they could be blocked with a specific message, something like "Years are not useful tags, you probably are referring to a software version, if so use the full name as the tag, for example: windows-server-2008, exchange-2007"</p>

<p>This is somewhat a dupe of: <a href="http://meta.stackexchange.com/questions/31184/what-can-be-done-about-ambiguous-tagging">http://meta.stackexchange.com/questions/31184/what-can-be-done-about-ambiguous-tagging</a> </p>