title: Is REST DELETE really idempotent?
body: <p>DELETE is supposed to be idempotent.</p>
  
  <p>If I DELETE <a href="http://example.com/account/123">http://example.com/account/123</a> it's going to delete the account.</p>
  
  <p>If I do it again would I expect a 404, since the account no longer exists? What if I attempt to DELETE an account that has never existed?</p>