I think the user tag (x3565) should go away. In virtually every case, either a more appropriate tag such as user-interface, username, etc. should be used, or the question involves doing something with a user, which is too general to make watching the user tag be of any use, or the question involves a "user" in the context of system administration, which is off-topic for SO.
Some recent examples include:
Of course data is entered by a user; the user tag adds no key information to this question.
This is a server administration question.
- Default logged in user to SQL Server column The user tag, I believe, does nothing to help categorize this question. Incidentally, this is also a case for getting rid of the [default] tag.
- How to get Windows username in Java? The user tag was unnecessary. I removed the tag from this question and replaced it with username (which, in itself, seems rather questionable).
Those were just picked from the top of the list on the first page of results. That list goes on; I believe it is self-evident by looking at the questions currently tagged user.