randomsecretdoggo seems to have been banned without them breaking any rules. Here is a link to the Twitter post that got them banned on e621: https://twitter.com/paintedlykon/status/1401476988246892550 . While at first it seems like a confession to have engaged in bestiality, it does not say anything about actually doing it. It is at most just a creepy comment, also it was not posted on e621.

That should be something to bring up to the admins via DM, not a public forum post which will just cause unnecessary drama.

He fucked around and he found out.

(Allegedly) literally.