Simplest solution for fragmented communities: Redirect comments to one post (by asking or with new functionality)

EDIT: Thank you for all the great responses! I agree that a forced implementation is no longer the way to go. I've left the post as is, aside from this comment, in case anyone wanted to reference part of it. At this point, I think implementation 1 (Sincere Request) is the way to go if anything.

I've seen a few of these posts, some with really cool solutions, but a lot of them are difficult to implement, or complicated for casual users to understand. Here is my proposal on how we can coordinate communities that share the same topic, while also keeping the spirit of federation.

This post has some general thoughts on why I think this is the best solution. It also has some possible implementations, including a trivial one that works already without any automod or code changes.

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