You literally can't, not if you want Fediverse & decentralisation to succeed.
Can't cheerlead federation from a place that defederates on a whim like a little village instance.
An intended flagship instance needs proper investigation, communication, & extensive negotiation policy before it cuts 70,000 queer, trans, progressive, allies etc out of it's network.
That's how Fedi dream dies & communities are harmed, depriving them of 70k support based on unsubstantiated sketchy info.
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