My 2 cents: Sunstein is advocating that the government and our legal system is ill-equipped and unable to handle the enforcement of current laws and therefore private citizens should be able to file suit on behalf animals in order to keep them safe from harm. At this point I'm going to take the AR approach: put this in terms of humans. When George W. Bush brought about the Patriot Act after 9/11, one section of it caused an outcry and was removed (and rightly, so, in my opinion). That section charged and gave individuals certain powers of state and would promote spying upon neighbors/clients, promoted false allegations and a whole string of other complications. Now, Sunstein believes we should give similar powers to the public, and by proxy aggressive, radical groups, in the interest of animal rights? That's not just a recipe for the end of hunting, but a quagmire for society in general.