As I keep an eye on, and moderate this blog regularly, you probably don't notice comments that are deleted, but in case you wondered here are couple of the things that will get your comments unapproved, and deleted:
1. Anonymous: Fake web links, and made up email addresses. If your a real person with a real comment, put something that's true about you into your comment, or it will be unapproved. 2. Rudeness: Being rude is unacceptable. Ask questions don't jump on people with comments.