As someone in the Graphic Design chatroom pointed out:
why do you guys have user-experience ? seems like every question could be tagged that :D
And I think I agree. So; do we really need this tag? Does it serve a purpose that means we can't get rid of it without compromising something or other? Is the name of the site not clue enough that every question will be related to User Experience in some way or another?
If enough people agree then we can request they tag be blacklisted so that users can no longer select it as a tag for their question. But if we have good reason to keep it around then we'll do so (and just get a bit more stringent with tag tidying up).