I fully understand providing the option. "Create an account, or just log in with Facebook" is good for the user. My objection is when the "create an account" op

I fully understand providing the option. "Create an account, or just log in with Facebook" is good for the user. My objection is when the "create an account" option isn't there and I can only use the site by logging in through a third party. Anyasq is an example of this; you can only log in with facebook or twitter.