Touche. But the only time I have heard about this personally is from geurilla growers, and that was a argument on their side, human pee also keeps the deer away, I hear.
I seriously feel almost retarded, not because you brought up that point, it's because I have read a million bottles that read "urea" as one of the ingredients, and never put that together. I haven't read that article yet, because I'm drunk now, lol, but I probably will tomorrow, seems interesting enough.
..................................weird