We are looking into ways to disable the Facebook Javascript on pages its not completely required for. There are features like the Like button that need the Facebook library loading on the page though as the user can't interact with it if it's not there.
For Facebook Login, you may want to switch the "Show 'Login Credentials' in Popup" to 'No', which will redirect the user to Facebook to authenticate. That works around adblocks and other social-blocking methods that some browsers employ as well. In a future update of JFBConnect, if you use that setting and don't use any of the Facebook social features on a page, then we are planning to not include the Facebook Javascript library on those pages as it won't be necessary.
I hope that helps,
Alex