Pirateat40 AKA Pirate AKA Trendon Shavers.
Operator of the largest scam in bitcoin history - he operated a ponzi scheme which initially promised a guaranteed a daily profit of 1%, and then disappeared with an unknown amount of bitcoins on August 2012. Thoughts were that the amount was about 500,000 bitcoins, estimated worth around $5,000,000 at the time. But these amounts were soon quashed once unofficial forum investigators realised a large hoard of Bitcoin found in their analysis did not belong to Pirate, but belonged to a blackmarket website in which Pirate used to mix his funds to hide the actual amounts he held/stolen.
SEC (The U.S Securities and Exchange Commission) charged Trendon Shavers with defrauding investors in a Ponzi scheme.