Isn't it really insidious?! Just to allow google to spy on users as much as possible at any costs, they program other servers like youtube in a way to force users to "deliberately" allow google to follow them all over the web, not just on their own sites and youtube itself!
But good to know this trick makes comments possible again, thanks whoever figured this out.
And thanks for my beloved KM privbar again, one button click to allow google-cookies just on THIS site, and afterwards one click to block them again. Ha!