I've thought about that a little. The option for a user interface wouldn't be too difficult.
But the question is how to get it in there on blockchain so all platforms can?

They can have a community connected account re-post the account with 100% beneficiary to the original author? But set up to be seen only in the community.

I suppose editing the original post could be an option.

Not entirely certain... but i see lots of use cases... and also plenty of abuse possibilities ... aka spam.