I did something like this with <a href="http:&#x2F;&#x2F;nightchamber.com" rel="nofollow">http:&#x2F;&#x2F;nightchamber.com</a>, where your &#x27;login&#x27; is just a unique URL. It&#x27;s a fun idea, but it only works when the stakes are low (which they are for nightchamber, it&#x27;s not like there&#x27;s anything useful in the account anyway). I sure as hell wouldn&#x27;t want paypal or amazon using that kind of scheme though.