Comment Re:Cookies and referers (Score 2) 158
I'll always register a new account (usually easy enough) if I really want - too worried about such sites snooping my passwords.
When you use a federated single-sign-on capability like this, your password is NEVER sent to the service provider (the one you're logging in to using you Yahoo/Facebook/Google/etc account). It is only sent to the authenticating service (the identity provider), who already has it, and then that provider generates a signed message in a specific format (OpenID, SAML, etc) that vouches for your identity to the other site. In this model, your password is actually exposed LESS than if you create an account at the site in question.