It is your market. I am a teenager (guessing that is your market based on stats). I have a facebook account (don't use it much), but will absolutely never sign

It is your market. I am a teenager (guessing that is your market based on stats). I have a facebook account (don't use it much), but will absolutely never sign in to another site using Facebook. The security issues worry me, as does the access you have as a service to my facebook profile.