We're having trouble getting the mvc4 tag to be automatically removed because people keep using it so much, since it shows up first in the tag suggestions list when you type in "mvc4".
Would it be possible to remove the mvc4 tag or make it a synonym of asp.net-mvc-4 (though, the latter would only expand confusion between framework and design pattern for ASP.NET users) on Stack Overflow?
.. and another user (somewhat chronic help-vamp) made a topic in this tag: