[steelaz]

Most websites that are adding social login buttons also keep their own registration/authentication setup. I think by adding social login buttons you also increase attack surface on your website, no matter how good third party security is.

[mkjones]

My point is that you shouldn't bother spending any time rolling your own registration / authentication step.

Do you think that using 3rd party auth in lieu of your own auth decreases security?

[papsosouid]

Right, instead we should cut our potential userbase in half to promote facebook. That's very realistic.