Rules against communities that spam links?

Are there any rules on Lemmy.World about communities where the only poster is someone spam posting inflammatory links? It's easy enough to block those communities, but I imagine this is going to be off-putting for some new users not acclimated to the federated style of Lemmy.

Also if rules are being broken by community moderators then the only people that can moderate a moderator is an admin and I'm not sure there are enough to find all of this.