The fact is that we can’t rely on any single website to hold the whole world’s knowledge, because it can be corrupted sooner or later. The only solution is a distributed architecture, with many smaller websites connecting with each other and sharing information. This is where ActivityPub comes in, the protocol used by Mastodon, Lemmy, Peertube and many other federated social media projects.
Thank god Lemmy has no malicious users/bad actors/spam issues...
Interesting idea anyway. I would be a bit more worried that when important information is siloed onto instances, each instance becomes a point of failure, and thus can be corrupted or lost.