> In addition, I'd demand removing Captcha-alike when using VPN services, to avoid them from tracking my IP.
You'll demand that from whom? Is not Google that plops the captcha in your face, is the particular webiste/app that is doing it. Is the same thing as with the Facebook trackers/buttons.
Just because I am a GMail user does not automatically mean that you can trace all my web search.
In addition, I'd demand removing Captcha-alike when using VPN services, to avoid them from tracking my IP.
I mean, even if you are not logged-in, they can still correlate IPs across products.