Nope. Any Facebook user can comment on your site, whether they are logged into your site or not. The only requirement is that they're logged into Facebook.(Second thoughts: do i have to submit for permission to Facebook for JFBCcomments? as i have'nt done so )
Generally, you shouldn't. If you just want a 'default' image that's used as a backup for every page, in case a more specific image isn't set for that page, like a logo, you should use the Open Graph defaults configuration area of JFBConnect. Go to Open Graph -> Configuration. In the "Defaults" box, add a line like:Also wanted to ask, how do implement the easy tag for OG image {SCOpenGraph image=xyz}, can i put in my template index.php file?
image=http://site.com/my-logo.jpg
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