Everyone has one, no matter how irrelevant the topic might be to their actual life. And everyone, according to every commentator on the Internet who can’t actually substantiate their argument, is entitled to an opinion. You know the way it goes. A person says something that is perhaps inflammatory or offensive, a handful of people provide an argument to the contrary and the original comment-maker says “Well, I’m entitled to my opinion!” or something along those lines. They use it with authority, as if their opinions are sacrosanct.