As mentioned by sdcooke the Guardian allows you to click "no" and view the article anyway, there are a few others (I believe Yahoo) but I've not clicked on any in a few days so I don't recall which exactly. Maybe it's a country specific implementation, I'm in the UK.
Interesting...I certainly could be wrong or the functionality may have changed since I last looked in to it. I do know for a fact that when I click "no" on the Yahoo links it brings me back to Facebook, not the article. I'm in the US.
