So I recently discovered that my site had dropped for PageRank 5 to a PageRank 3. I looked into it, and I still have lots of links coming to my site. It appears that I was penalized by Google, and it seems to be because I had some paid links on my homepage. So, I decided to add rel="nofollow" to the links. The only problem is that when you try to do this with the Blogroll editor in WordPress, there is no nofollow option. So I had to add one.
If you wish to do the same, it's quite easy. Just find the /wp-admin/edit-link-form.php file, create a backup copy of it, and modify it. Look for lines 113 and 114, which should look like:
<tr> <th scope="row"> <?php _e('identity') ?> </th>
And add this code before it:
<tr> <th scope="row"> nofollow </th> <td> <label for="nofo"> <input class="valinp" type="checkbox" name="nofo" value="nofollow" id="nofo" <?php xfn_check('nofo', 'nofollow'); ?> /> nofollow</label> </td> </tr>
You'll now be able to edit your blogroll links and add rel="nofollow" to any you wish.