I went through all the tags which only had at most 3 questions tagged. The following are all the ones which do not correspond to a particular series, person, or studio, ordered in the same way they are ordered at https://anime.stackexchange.com/tags. These seem to be the most controversial tags, though there may be other controversies with the larger tags in this category. I've ignored those for now since I think each of them deserves a separate meta post.
production anime-physics music technology voice-acting retag season prequel origin sound-effects meme mistranslation light-novel live-action manga-history currently-airing doujinshi fillers game-history censorship conventions copyright crossovers amv analysis animation-mistakes
It seems to me that some of these are good tags, and some are very clearly not necessary. Which should we keep, which should we merge, and which should we get rid of?
Note: I'm asking this because it seems like applying the changes I propose below to 26 tags on my own without community support would be overstepping my bounds, and also so that we can get a mod to do the merges without bumping questions.