I can appreciate someone leaving a post on my blog to get a link or something but what gets to me the most is when what they say has absolutely nothing to do with my blog or the article they are posting on. At least challenge me to figure out if it is spam or not. Akismet does get rid of a lot of them though. I used to get at least 8-10 spam posts a day to the blogs I manage and now maybe one will slip through the cracks and that is one a week if that. Save yourself some time and hassle by using it. I guess my main question is… does it really help the google rankings? It is so unfair if it is where I am adding content to climb up rankings and some guy is spamming everyone to get ahead of me