Hi there,

to globally disable comments and not set them post by post, you should remove the comment block from the template files. A simpler solution could be by using this small plugin

Regards
djwd

I suggest to go with the plugin solution not to lose your changes in case of theme update.

Btw you should open single.php and comment out/remove this part (lines 24-44)

<?php // Load Facebook or WP Comments
			$pm_comment_type = get_post_meta(get_the_ID(), 'pm_comment_type', true);
			
			$url = (!empty($_SERVER['HTTPS'])) ? "https://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'] : "http://" . $_SERVER['SERVER_NAME'] . $_SERVER['REQUEST_URI'];
			?>
			
			<?php if ($pm_comment_type == 'fb') { ?>
					
				<div class="fb-comments" data-href="<?php echo $url; ?>" data-num-posts="4"></div>
				
			<?php } elseif ($pm_comment_type == 'none') { 
				
						echo '';
			
				  } else {
				
					if ( comments_open() || '0' != get_comments_number() )
					comments_template( '', true );
				  }
			?>

Hope this helps

djwd