Definitely feels like a "report this website to google" button would be fantastic, if there was a way to automate/simplify such a thing for 1-3 clicks.
I hate to say the word, and especially because HN hates it, but this is effectively what DMCA notices are.
Its not copyright infringement to cause users to request the site and render in an iframe its closer to plugging yourself into someone else's electrical line
Google taking down a result from their site doesn't stop theft on a third-party's site.