Ask HN: How safe is it to login with Facebook or Google?
Lots of sites offer to avoid creating accounts with them and instead allow you to sign in with yor google or Facebook account. For eg Flickr.  If I were to sign up for flickr using my google id what am I giving up in return for the convinence of not having to create a separate Flickr account. How much privacy am I giving up ? Given a sign up choice website specific account vs google/Facebook acct based sigh up, what is the better option ?