That's just anecdotal as the author's statement. Your experience doesn't make his any less plausible. Besides, his core argument is more compelling than just "

That's just anecdotal as the author's statement. Your experience doesn't make his any less plausible. Besides, his core argument is more compelling than just "I've never encountered a socialist." See the next paragraph: "...I see very few attempts to provide a complete critique of libertarian philosophy. There are a bunch of ad hoc critiques of specific positions: people arguing for socialist health care, people in favor of gun control. But one of the things that draws people to libertarianism is that it is a unified, harmonious system."