According to the number of Sphinns, it looks like a lot SEOs agree it’s a myth. That’s understandable, as it would be very unfair for the search engines to allow this type of thing to happen.
Unfortunately the situation is not as simple as it first seems. As has been my practice on this blog, let's dig a little bit deeper to understand why—although difficult and possibly expensive—it is very well possible to pull of this exploit. For those concerned, I explained how to counter this type of attack in a previous post about negative SEOs. Check it out. Read more