Do we have an established practice for requesting defederation?

I would very much like to request that we defederate from burggit.moe (because I would prefer to keep my lemmy experience free of loli porn) and I went looking for the best way to do this, but the best I could come up with was posting to meta and that seems like the wrong place.

I feel like I missed something obvious ¯_(ツ)_/¯