

There is no way to exclude individual communities. The post URLs are generic, like /post/1234. From nginx or other proxies, I cannot tell what community they belong to. I would love to have my own be searchable, but not at the price of tainting my project’s reputation.
There are plenty of instances that copy the original content. As an instance owner that runs a only a single project specific community, I should be able to decide what content is available on my domain, and what isn’t. Don’t you think?
Aside from the questionable content, there is also legal issues around it that I’d rather not deal with.