Hehe, I leave this job to ublock origin. And that's my answer to this thread. Except that loading google's JS script to create the login popup can compromise my privacy. And I don't like that one bit.

Update: I have revised my stance after thinking that no ad-blocker is 100% bullet proof, 100% of the times, and that this looks to me far more serious than I thought, here: Re: login with google account