I've seen questions like... Is there an #anime instance? The answer is generally... No.

Users tend to be spread across a large number of instances and they might have a similar interest.

I looked into one instance which *marketed* itself as one and as ironically "non toxic" ("urusai"), and I saw high school bully type posts from *the admin* attacking large swathes of the community and sowing discord.

At other times, there would be a few other users from this community engaging in *concern trolling* on tags. This instance tends to be buds ("our sister instance") with the instance ("sakurajima"), less overtly trollish but if you dig into it, you can still find it, and I tend to lump them in together.