In the paper, Paolo Salucci, the author states:
"we ask all scientists studying theoretically, observationally or by computer simulations the fields of Dark Matter, Galaxy Formations, Properties of Galaxies, Alternatives to Dark matter, Detection of Dark Matter, Cosmology and similaria, who are in FB to join the group "Rotation Curves of Spirals are NOT Flat"
...
and we ask the same kind of scientists who are not on FB, and any astrophysicists interested, to browse the above group, but especially to seriously consider the claim around which such group has been built and, if it is the case, to look at the supporting evidence in the papers provided below.
This paper sets the experiment, the results will be published in due time."
I found another 'blog' page by a 'Sarah Kendrew' - a postdoc astronomy in the Netherlands, (my sources are goin' downhill fast, folks

), who says this about the whole experiment:
"So yes, I do cautiously believe social networking can have an effect on science policy – maybe not for astrophysics on its own, but on broader issues we do have a voice.
I think Salucci’s idea is really good. But the way it’s currently outlined, it won’t allow us to conclude anything. If Salucci would like this to be considered a real experiment, I’d like to see it described as one."
I agree. Good words.
Cheers