From what I understand, the professor has since gone underground out of fear for his safety. Apparently nobody told him that freedom of speech doesn't include freedom from people who disagree with what you have to say. Although I don't condone threats to the guy, he's apparently having himself a Dixie Chicks experience.
Funny how liberals will do everything they can to shut down and silence conservatives, but when the same thing happens to them they scream censorship and oppression.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...