Vanta, @vantablack , has set up the Anti-Meta Admin Pact, a google doc for fediverse instance admins to show their support for fediblocking Meta (Facebook, Instagram, P92). Admins can sign the pact here:

https://forms.gle/8ctNNTGmjuEZcSSEA

Anyone can view who has signed the pact here:

https://vantaa.black/pact