I was just posting a comment on a blog and noticed they had a note that said “Note: all links are nofollowed “. That just set me off. I know everybody does it because most up to date blog software installs it by default and makes it difficult to remove. I understand how some may not even know it is there. But I don’t understand why major SEO blogs leave it up and some even embrace it as a good idea. What does it accomplish? Has anybody seen a drop in spam? If anything spam has gone up. If you are going to allow comments you should allow people that leave good comments to get a link.
If you really want to stop spam you need to customize your template. Take off any text that is default to your blog software. Take off any text that is used on most blogs. If you need that text use an image instead. Make it so people have to be logged in to leave comments. The only people doing blog spam anymore are the amateurs. As soon as some technique becomes well known the real spammers have moved on to something else.
For those who want to remove nofollow from WordPress there is a plugin.