Wasn't there a post showing how bad defederation is as a defence when other instances were doing so?
Why don't we just have a bot that removes comments from META and messages the user, that in order to comment they must use another instance? This way we can use METAs own tactics against them. Drive users to our instances, regulate communities automatically and still increase overall content generated rather than styfile.
Absolutely straight, we need a lot more of this too.