@selea Who said "nuke everything"? I'm sure you are aware that there are multiple levels of Federation. Such a feature wouldn't necessarily mean to suspend half of the Fediverse. It means that I have options based on the settings of a remote instance.
To be more specific: "Don't accept more than X DMs per Y hours from instances which allow unapproved registrations" with the option to see those instances trying to send DMs and individually add them to an exception list. Same as the Moderation tools already there for the "Trending" section.