This is the opposite problem of Too many tags for d&d. The specific issue which prompts it is the [history] tag, which is currently being used to tag both questions about the history of RPGs and questions about historical settings. If this is not viewed as a problem, by all means tell me so. But assuming it is, what is the SE way to resolve it?
Of course, it's pretty easy to suggest ways of making these tags more specific. But I'm asking about the general approach to this issue - I would have thought other sites have run into this before.