The AMA should be warning doctors not to be sending this kind of information out to anonymous recipients. Of course, doctors should be smart enough to figure that out, but some might be pissed off enough to not think this through.
This is the Facebook link for the site. Again, no real information about the person[s] behind this.
Regardless, this is potentially an interstate scam that needs to be investigated by the FBI. Of course, that doesn't address the REAL PROBLEM.