I think the tag magic-missile is a little too precise and doesn't add anything. Are tags like these really necessary and should we keep using them?
No. It is goofy and unhelpful. Not every noun in a question should be a tag, especially in the age of search.
However, here on RPG.SE tags are a crowdsourced emergent folksonomy. If you detest it, remove it from the question(s) where it appears and it should eventually get reaped. Question askers may disagree and re-add it, in which case we'll let it ride - the modclique(tm) tries to be as hands off as possible and let the community run.
I wanted to propose a heuristic for which tags we should keep and which ones we should discard. Here goes:
- Would you ever seek an expert on
- Would you ever call yourself an expert on
- Does the question become ambiguous or unanswerable if you remove the
I'd say, if the answer to any one of these questions is a no, then that tag is probably not necessary.