1851
PSA: Lemmy votes can be manipulated
(feddit.nl)
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Fediverse is a portmanteau of "federation" and "universe".
Getting started on Fediverse;
That sounds a bit hyperbolic.
You can externalize the web of trust with a decentralized system, and then just link it to accounts at whatever service you're using. You could use a browser extension, for example, that shows you whether you trust a commenter or poster.
That list wouldn't get federated out, it could live in its own ecosystem, and update your local instance so it provides a separate list of votes for people in your web of trust. So only your admin (which could be you!) would know who you trust, and it would send two sets of vote totals to your client (or maybe three if you wanted to know how many votes it got from your instance alone).
So no, I don't think it needs to be invasive at all.
My point is you can have a mixed system. For example:
That's not a ton of data, and the "special interest" users wouldn't need to be synchronized to any other instance. The client would store the WoT data and update the server as needed (this way the server doesn't need any transitive logic, the client handles it).
Facebook and Twitter have always had their equivalent of upvotes be public.
What if the web of trust is calculated with upvotes and downvotes? We already trust server admins to store those.