I posted this thought on another 'beard' thread a couple of months ago. Cut/pasted from that post:
...the 'beard rule' is a microcosm of the WTS/JWs. We've latched on to this seemingly innocent thing because it demonstrates the authoritarian rule of the WTS over it's members. One cannot dictate to oneself this simple grooming choice. It has to be made for you. The same for your entertainment choices. Your celebrations. Even your level of education.
When you're inside the religion, and allowing them to control your thinking and actions, you don't think about it. But as soon as you exert your freedom, this one minor thing sticks out as a huge signal that something is wrong with the ruling body of this group.