An interesting tool.

The question to ask is when a website owner discovers their theme has Google-hosted fonts (or even a Google fonts plugin), then what?

Hard to say what they would do; change themes (if they can find one not using hosted Google Fonts), ignore it, or contact the theme creator. Remember, themes are not the only ones with this issue, plugins that load Google fonts can be added to the list.

This reminds me, and if I remember right, Anders Norén has already changed every theme of his because of this. I’m still working on it (he’s faster than me, lol), although, my new themes now included local fonts :)