It would be cool if this could be extended to automatically clearing those junk sites off Google's results, maybe by querying for a few extra pages, deleting the garbage, and then re-assembling them into fewer pages. Google spam filters would be great, I could also put in a rule to eliminate any page title that starts with a number ("Ten great ways to...").

Google used to have a way to block sites from search results. Do they still have that option?

They did offer the Personal Blocklist extension[1] for Chrome, long ago. But it's been sunsetted, there are some alternatives.

1: https://googleblog.blogspot.com/2011/02/new-chrome-extension...

I wrote a userscript to do this if you're interested:

https://code.byuu.org/google

It blocks search and image results by pattern, and also removes the URL tracker wrapping wherever possible.