For the American Dad writer, see: Dan Vebber
In All About Steve, the CIA has been sent letters from a domestic terrorist hacker they can't decipher. Stan finds from Snot that the hacker's language is "Elvish" and they translate the hacker's notes, discovering who the hacker is. They go to the sci-fi convention to find the hacker, Dan Vebber, a J.R.R. Tolkien fan who "hopes to create a middle-earth in the here and now."
Stan with the four nerds look for Dan Vebber. Dan is giving a panel on Frodo Baggins v. Luke Skywalker. After a fight and chase, Stan and Steve corner Dan. Steve burns a pair of Peter Jackson's underwear to distract Dan. When Dan tries to use his use his 'ring of invisibility', it fails to work and he is shot in the leg by Stan.