Facebook integration has now been launched. This offers a few benefits: 1) You can like a post (there's a discrete link at the bottom) to share it to Facebook. We like more visitors, so we encourage this behaviour. 2) Login with Facebook. You first have to associate your account - click your name in the top right then External Accounts. From them on, you can login with Facebook. 3) New users will be able to register via Facebook, automatically creating a link from the start. If you don't like use/like Facebook it matters no, these features are entirely optional.