Marshal Webb was involved in the hacking of the game "Dues Ex" and was/is involved in countless other cybercrimes. He came to fame when he tried to snitch out LulzSec. They exposed his personal information via pastebin.
Information from LulzSec:
Name: Marshal Webb
Last known IP: cpe-174-101-240-242.cinci.res.rr.com (174.101.240.242)
Location: MARSH #336
1204 W Main St
Hamilton, Ohio 45013