The event that played out yesterday in the #FediBlock tag is illustrative of why instance admins generally find the tag useless. What was conceived as a tag to highlight extremely blatant dangers has devolved into personal feuds and grievances, watering down the entire project.
For more discussion, see this excerpt from "Findings Report: Governance on Fediverse Microblogging Servers" (https://fediverse-governance.github.io/)