I’ve made a MRF ForceMastodonUnlistedPolicy, patterned on ForceBotUnlistedPolicy, but instead of removing bots from your federated timeline it removes Mastodon® users, which are often equally tedious and repetitive. Optionally you can add an allowlist to spare certain nice people like lizards(.)live:
config :pleroma, :mrf_delistmasto, domain_allowlist: [ "circumstances.run", "lizards.live", "mastodon.cysioland.pl", "social.treehouse.systems" ](this should work in admin-fe too, but I can’t be bothered to test it right now; buyers beware)
Please note that Mastodon® is a registered trademark of Mastodon gGmbH.