As great at this probably is, I don&#x27;t think adding yet another dependency to facebook is a good thing.<p>I&#x27;m getting tired of services that only accept facebook users.
Having a facebook login or any other facebook service requiring the user to be a facebook user is not bad in itself (and can be pretty useful), but it should _always_ have an alternative.<p>That&#x27;s why I think projects like Dial2Verify Twilio are a great thing. They&#x27;re still not perfect though, as some said here on HN.