One of the better articles I have seen in a long time and interesting that it comes from someone in one of those fields of study derided as of little practical use - philosophy. The whole point is that a large part of the populace will not engage in rational argument based on logical reasoning and general social standards. The best position based on reason and logic does not necessarily win. Increasingly the loudest and most aggressive wins. The unlimited free speech ideals of J.S. Mill are utopian and if you disagree with that idea try telling it to Germans who found it fit to ban holocaust denial or anything advocating Nazism.  

Years ago you could watch "The Great Debate" on television.  No interrupting your opponent. Opening statements, followed by carefully timed three minute opportunities to put your point of view followed by time for a rebuttal. Then closing statements and an audience vote on the winner. Debate in today's society has become a circus that needs moderation.