Are you sure? Yes they use Camo, but that's a proxy to ensure that you don't serve JS from the same domain as github.com so that 3rd party assets have the Java

Are you sure? Yes they use Camo, but that's a proxy to ensure that you don't serve JS from the same domain as github.com so that 3rd party assets have the JavaScript domain security policy applied. I do not believe that Camo is a sanitising proxy... just a proxy.