Which would be a success of Google's new algorithm, as far as Google's users are concerned: force the website owner to separate out his own garbage, and only the good stuff makes it to the search results.

Although I wonder: if a website spreads enough of its "garbage" around multiple domains (not subdomains), it might be able to still avoid the new blacklist threshold while polluting entire pages of Google results. It's not hard to trivially reskin your site and pump it through hundreds of domains--certain sites in, ahem, seedier parts of the web have done it for years.