An anime meme subreddit decided to ban the use of a specific word as it was seen as a slur for trans people. This sparked a subreddit-wide civil war, and the sub split off into multiple new subs formed on the basis of being the same as the old sub but with slurs allowed. As a bonus, the sub that banned the slur became better, because it turns out exiling all of the people who want to use a slur from your community gets rid of mostly shitty people, although the positive change ended up being temporary as the spinoff subs burned out and everyone came back to the original.

Similar story: /r/hydrohomies was born because the original "drink water meme subreddit" was named after the N word and got quarantined. Same principle applies here but in reverse - all of the people who wanted to use slurs stayed in the original, and the new subreddit was a lot nicer as a result. Although by the time this split happened the meme was pretty stale so the people in the new sub were cringey for a different reason.