> site owners can check that the request isn't coming from a Google-published IP and see that it's a fake, right? just because they can doesn't mean they will.

> site owners can check that the request isn't coming from a Google-published IP and see that it's a fake, right? just because they can doesn't mean they will... also most "site owners" are (by this point) a completely different people than "site operators" (who I take to be the 'engineers' who indeed can check this IP things)