Dan Griffiths

Widgit

Comment Controller allows users to disable display of comments for their account, 
and allows site admins to selectively disable comments per-post-type or per-role.

Comment Controller

Allow users to disable comments for their account, or disable comments site-wide per post type or role.

mastergraphiks

This is the Simple Plugin which required no special access or control, Simple install it and it will remove the URL from your Comments Form!

Disable Comment Url

Nice and simple plugin help you to remove URL from comment to avoid people to do spam comments by posting their urls to your website

Comment Controller vs Disable Comment Url