JFBConnect has many ways to control how and where the social buttons display. They can be set to show on all articles, articles in specific categories or only select articles. We have additional features, like our JFBCSocialShare module which can be used to show the 'floating' share buttons like on this site. That's a standard Joomla module, so you'd have the same control over what pages that shows on as you would with any other module.
I hope that helps answer your questions, but should you need anything else, please let me know.