I've never been asked for a second ID. Guess I have one of those 'honest' faces...
On a related note to that above Link, Joan Rivers pulled a stunt on her talk show years ago-she had postage stamps made with her face on them and used them.
All the letters got through to their destinations.
Same premise as the thread and the linked site-no one really checks anything, we're just conditioned to think they do, which is what 'they' want.