On July 4th Gab is coming on to the Fediverse by switching over to Mastodon on their servers.

This means that you can shut the door on them today by preemptively have them fully suspended from your instances. So your users do not have risk getting harassed by any of their users, and they from the start be blocked off from major portions of the Fediverse.

Thank you for your consideration and 

@maloki Du you already know something about their federating domains?Do I need to block only gab.com or also some subdomains or gab.ai or something else?

@nipos they are switching the platform on gab.com to Mastodon, they made a public announcement to this affect.

.ai should also be preemptively blocked

@maloki Thank you,blocked on my instance muensterland.social ✅