Context:
From the start of this sting, I have conferred with a small group of scientists who care deeply about open access. Some say that the open-access model itself is not to blame for the poor quality control revealed by Science's investigation. If I had targeted traditional, subscription-based journals, Roos told me, "I strongly suspect you would get the same result."* But open access has multiplied
that underclass of journals, and the number of papers they publish. "Everyone agrees that open-access is a good thing," Roos says. "The question is how to achieve it."
More:
http://www.sciencemag.org/content/342/6154/60.full