Cool stuff. What I usually do is click the link and then set the privacy level to "only me" so that no one knows what I'm reading.
Actually, more often than not, I've forgotten about "social reader", so click on the headline -- then, when they try to get me to give them access to my account, re-think whether I can be bothered searching for the article. About half the time, that stupid popup costs them at least one pair of eyes.
I agree with the giant text on the link: "Worst. Feature. Ever." It's just such a blatant, obnoxious attempt to manipulate your users.