Well, there's a line between having a disorder and having quirks. In somebody with the actual disorder, it seriously interferes with their ability to lead a normal life. Getting distracted easily is not a disorder. Wanting things to be symmetrical or having to check to make sure the stove is off before leaving the house is not a disorder.
I have friends who have the actual disorder and their behavior is really no laughing/entertaining matter. It really affects them, and they have to alter the way they live based on what their obsessions and compulsions are. A lot of time is spent trying to hide it because its embarrassing to them, and that can lead to severe anxiety problems on top of OCD.