I’ve seen Hexbear and lemmygrad brigading communities before. They (lemmygrad) will also serial downvote anything they don’t like.
Personally, I would vote to defederate from both Hexbear and lemmygrad. Kbin is nice because it feels like the majority of people are posting, commenting, and overall discussing in good faith. It’s a nice culture. Neither of those two instances fit with it.