My brain is a bit dodgy at times. You see this is how it works:
you wonder why no one has commented to any posts even though people do visit the site
you try to create your own comment to make sure it works
everything is good, comment works, so you shrug
2 weeks later you realize that of course you can generate a comment you have admin priveleges!!!!!!
turn on registration so the nice people can leave comments (and cringe about the fact that there will be 100 times more spam than comments)
So make my spam blocking/deleting duties worth it, comment today!