[noasaservice]

> Well any particular Mastodon server can end up ruined or with ads.

Too true. And in cases like that, I have already blocked bitcoinhackers.org .

And it's trivial to block individuals OR whole servers from your account. And server admins can block as well to the whole server.

So, sure, go ahead and make a spam-stodon. You'll be defederated within a week.