title: Easiest way to integrate captcha's into Symfony2 FOSUserBundle registration?
body: <p>I'm using Symfony2 and the FOSUserBundle to manage registration and logins. I'd like to add a captcha system. Is there are pre-existing bundle or tutorial on this? </p>
  
  <p>Of course, I could try to roll my own using Google re-captcha. In that case, is Google reCaptcha a good choice, or should I use some other API?</p>