i actually don't mind that. In a desert with everywhere sand, sand means nothing to you. Most meaningful is the oasis and so you will engage in a sort of taxis towards the most meaningful resources. Spam on a knowledge base can be mitigated by various levels of openness on relays and communities.

but even without that, all notes can have embedding vectors attached. Ultimately, the visibility of notes in a system will grow if it is meaningul to the user. So if notes mean nothing to you or are considered spam, thats fine. You stay outside of that area in semantic space. It may also not be considered spam from other users.