@ErikUden On defederation - spam attacks like this are bound to be more common as the fediverse grows. For forward planning, I think it would be useful if there was some sort of system that an admin could enable to temporarily drop any incoming new user interactions from existing federated servers. That way you don't need to hard-block a whole server (in the case where a legit server is temporarily overwhelmed), and would lessen the impact on those legitimate users. Essentially send any unsolicited messages > /dev/null while such an option is turned on.