To me, this whole "Cecil" episode represents pretty much everything that is wrong with Internet "social justice". While clearly the killing of this particular lion involved what almost certainly was some illegal behavior on the part of the hired guide, or Palmer, or the both of them. They should be subjected to whatever punishments the law calls for, if found guilty of any crimes. But the collective Internet "freak out", complete with death threats, calls for summary execution of Palmer, celebrities Tweeting out his home address, and making him out to be the personification of evil on this planet gives new meaning to the words "disproportionate response". Add to that the media "pile-on" that saw the case of "Cecil's" death became multi-day front-page fodder for many global newspapers and Internet news outlets and you end up with one heck of an echo chamber.
I think CGP Grey's analysis is right again that "anger" is the largest virus on the Internet: