Two crews and a switch
The Legion of Doom formed around 1984, founded by a phreak calling himself Lex Luthor and named, with total sincerity, after the Super Friends villains. LOD's members were specialists in telephone switching systems, and what made them influential was not intrusion but documentation: their technical files, published in Phrack, explained how the phone network actually worked to a generation that could not learn it anywhere else.
The Masters of Deception formed in New York at the end of the decade around Mark Abene, who hacked as Phiber Optik and had been pushed out of LOD after a falling-out. MOD was younger, more urban, more openly defiant, and just as deep inside the regional operating companies' switches.
The rivalry that followed - remembered as the Great Hacker War - ran for roughly two years on hijacked conference bridges, disconnected lines, deleted accounts and social engineering aimed at each other. It produced almost no damage to anybody outside the two crews, and enormous quantities of pride. It was, in the plainest terms, a gang feud conducted entirely inside a public utility.
The document that cost thirteen dollars
In 1989 a LOD-adjacent hacker copied an internal BellSouth administrative document about the E911 emergency system and it made its way to , whose editor Craig Neidorf published an edited version. BellSouth valued the file at $79,449.
The prosecution of Neidorf became the case the government could not win. His defence, assisted by attorney Sheldon Zenner and expert John Nagle, established at trial that the same information was available in a booklet BellSouth would sell to anyone for about thirteen dollars. The government dropped the case mid-trial. A stolen-property theory that survives only until someone checks the catalogue price is the clearest illustration this history offers of how badly the legal system was reasoning about information in 1990.
Operation Sundevil, and the raid on a game company
In May 1990 the US Secret Service executed : coordinated raids in fourteen cities, twenty-seven search warrants, dozens of computers and bulletin-board systems seized, aimed at credit-card and toll fraud. Convictions were few, and the boards that went dark included many with no connection to fraud at all - the seizure of a BBS took every user's private mail with it.
The most consequential error was not part of Sundevil proper but sits inseparably beside it. In March 1990 agents raided Steve Jackson Games, an Austin tabletop publisher, because an employee ran a bulletin board and was associated with . They seized the company's computers - and with them the manuscript of GURPS Cyberpunk, a role-playing game supplement, which was described as a handbook for computer crime. It was a game book. The company nearly went under, and later won damages after a court found the seizure of its electronic mail unlawful.
What grew out of the wreckage
Watching a game publisher raided over fiction and a magazine prosecuted over a thirteen-dollar booklet, Mitch Kapor - founder of Lotus - and John Perry Barlow, with John Gilmore, founded the Electronic Frontier Foundation in July 1990. Its founding purpose was exactly this: that the constitutional protections applying to a printing press must apply to a modem, and that people accused of computer crimes deserve a competent defence. Every subsequent fight the took on - encryption export, DeCSS, the CFAA's reach, surveillance litigation - descends from these raids.
Bruce Sterling turned the whole episode into The Hacker Crackdown (1992) and released it free online, which is how much of the field learned this history.
The endings were quieter than the war. Federal indictments in 1992 treated MOD as organised crime; Abene served a year, and New York magazine named him one of the city's smartest people while he was inside. Several LOD members went on to found respectable security consultancies - the underground-to-industry pipeline running years before the L0pht made it famous. The lesson the field kept is not about either crew. It is that a state responding to a subculture it does not understand will reliably seize the wrong things, and that the correction has to be built by someone.