Remove “Website” Field to Discourage Comment Spam
One way to discourage spam comments on WordPress blogs is to completely remove links in comments.
If you want to remove the “Website” field from your WordPress blog, here is a nice trick.
Go the the wp-includes folder. Locate the “comment-template.php” file.
For older versions, the file may be “comment-functions.php”.
Replace this line:
$return = “<a href=’$url’ rel=’external nofollow’>$author</a>”;
with
$return = $author;
The blog will accept links in the “Website” field, but the links won’t be published.

