the different usergroup between bot & guess(unregistered)
 

I think that will be great if vBulletin 5 separate bot & guess (unregistered) usergroup.
Because the Facebook like, Twitter tweet, google + & another content sharing system or social bookmarking system won't work when I lock my forum for the guess (unregistered) usergroup.

How can I expand, growth my forum if I'am unable to share it to the social media?