#1
The plugin tries its very best to hide this (and any other comment-related) messages.
If you still see the message, then it means your theme is overriding this behaviour, and you will have to edit its files manually to remove it. Two common approaches are to either delete or comment out the relevant lines in wp-content/your-theme/comments.php, or to add a declaration to wp-content/your-theme/style.css that hides the message from your visitors. In either case, make you you know what you are doing!