Important edit:
Meanwhile, the admin responded and clarified the situation. It was a configuration mistake. #antifa was auto blocked because of spam (if I got this correctly?) and #NoAfD basically for the same reason. The latter, however, wasn't resolved that fast because it has never been reported. Which is believable because it's super German specific.
https://floss.social/@admin/114041817627451631

Original:
@admin I'm sorry, what?!

@OddDev Thanks for reporting; this has been fixed.

There is a small number of hashtags that trended early in the history of the "trending hashtags", and not since then, that had a misconfiguration applied to them some years ago.

Because Mastodon has still not improved the trending hashtags admin feature since then, there are no admin tools to manage hashtags that aren't trending, so the only way we can (quickly) resolve this scenario is once they are discovered and reported.

People stand up for a reason.

I updated the Paradox of Tolerance.

Wishing all anti-racists a very righteously indignant MLK Jr. Day.

Long live his vision of Black liberation from white supremacy.