As the most recent example, the hashtag currently contains at least two instances that should not be blocked, and were merely targets of a malicious Pleroma MRF.
re: FediBlock meta
Pleroma does not trust forwarded remote content, or at least, did not in the Pleroma 1.x days, so any malicious MRF would be limited in scope to the instance where it was deployed.
We are CatCatNya~, a left-wing instance by cats, for cats (and more!).