Lucia's dofollow-plugin

[paul]

Because of the default set-up in wordpress for "no follow" in comments, it is difficult to give credit to your contributors those add valuable comments to your posts, I found this cool plugin which let you allow to give credit to such valuable contributor with a follow up link, it remove NoFollow tags to specific visitor that have made a certain number of comments which are valuable for your blog and the same time your blog continue "no follow" for other commentator.

Plugin: "Lucia’s Linky Love plugin" more information and download button: money.bigbucksblogger.com/lucias-linky-love-a-dofollow-plugin-to-foil-human-comment-spammers/

[stupha]

One thing to be aware of hen switching to "dofollow" is the increase in time you will need to spend moderating comments. You will have an increase in anything from "thin comments" (those that add little value to the conversation and are purely about creating that dofollow link), and particularly annoying spammer comments with nothing more to say than "nice post" or "thanks friend".

If you go this route, I also recommend using the Comment License plugin which adds text just under the comment form to which you can add approval criteria for the comments. By being explicit about selection criteria, you'll get a little less worthless spam.
wordpress.org/extend/plugins/comment-license/

[paul]

I read your comment and find some useful information, thanks for the plugin too. It is practically difficult job to filter the valid comments from a large bunch of spam comments especially when you are dealing with large number of blogs, however it's worth in case you find few genuine comments hidden in spam comments rather than deleting all spam comments in one stroke.