Trusting websites with your details is always a balancing act. When you use Facebook Login you share with us a small amount of information, basically about as much as what somebody not on your friends list would see if they looked at your public profile. In return, Facebook handles the authentication, so your password never passes through our server and we never get to see it.
We think that this is much more secure than the alternative, which is for us to store an email and password for each player. Read any tech blog these days and you’ll see stories about hacked password databases almost every week. We'd rather not become one of those stories.
We won't sell or transmit this information to any third party 'partners'. You can see more on our Legal