As soon as I see Google's sign in I disable javascript for that domain. It's like a glowing red sign that website doesn't care about my privacy at all.

Arguably the mother of all dark UI patterns, and pretty tangible proof that Google's "Don't be evil" times are long gone.

Agreed. It's on Pinterest too. It's way too jarring UI to make it seem like a website knows all of your Google accounts, it amazes me they thought that dropdown menu that was the right move.