I don’t have the foggiest idea.

And really, if I did have a good idea, I wouldn’t post it publicly anyway. That’d just be tipping my hand to the astroturfers.

“The fediverse” really can’t. That’s just the reality of a decentralized system. It’s going to be up to individual instances to sort it out.

But that’s a good thing, because what it means is that different instances can and will try different approaches, and between them, they’ll sooner or later hit on the one(s) that will be most effective.