title: Why I should NOT use Facebook Connect or OpenId for logging in users?
body: <p><a href="http://www.codinghorror.com/blog/2010/12/the-dirty-truth-about-web-passwords.html" rel="nofollow">Jeff Atwood argues</a> that we should stop asking users to register on our websites because we should rather use their "internet driver's license -- that is, [their] existing Twitter, Facebook, Google, or OpenID credentials" for authenticating them.</p>
  
  <p>While I am beginning to think that he may be right, I could not yet decide and I am looking for arguments against letting foreign sites gain control over personal web pages.</p>
  
  <p>Do you see any dangers of authenticating users like this?</p>