I comment when knowingly being uninformed because the resulting discussion is what helps me understand the topic better. The result of this, looking back on my comment history, is that I can come across as a bit of an asshole who's often wrong. That is why anonymity is important to me online, because my posting here is not really indicative of my real world behavior. It's a safe place to challenge ideas and opinions, and I feel like I've grown and learned a lot from it.

This is my long way of saying, maybe other people have different purposes for posting than you.