A comment is a spontaneous response to a blogpost. In this given world of spambots and texas holdem spammers, the security around blogs have been tightened.
On an ideal blog, commenting has several steps than blogging itself. First you type the comment, the main thing and for that you’ve to rake your brains to come up with a comment that proves you know everything better than the blogger himself. Then you type in your blogger.com login/pwd and finally type in a word for the screwed-up word verification thingy. By this time your thought on the comment would have changed. After you do you all this, the comment box tells you that the comment will be moderated by the author.
Until the author wakes up in the morning and logs in, your comment is just waiting there, crying to be approved. Assume that the author approves your comment as it talks only good about him and his post. For all you might know, tomorrow the blogger might change his opinion on the post and would remove the post itself. Then, you start thinking philosophically about the need for a social commenting system called blogs. Thats what I’m doing now.