This morning I had to go through and delete 36 spam posts left in the comments sections here. I don't have the verification feature turned on, because I want to keep this blog as easy and friendly for you as I can. And most of the time it's not a problem. These were all made by the same person, probably electroncially generated, because many of the same posts with poor grammar were repeated over and over, like someone who doesn't speak English very well. "Greets to you" and things like that. And they leave a link to their site.
Do you post in blogs where you have to post the verification (enter some wavy numbers in a box to make sure you're a real person reading and posting) and if so, how inconvenient is that for you?