7. The Electronic Frontier Foundation
In 1990 Secret Service agents raided the offices of Steve Jackson Games, which designed and sold role-playing titles. The raid was carried out with an unsigned search warrant and the offices were trashed, all in pursuit of a hacker accused of stealing a technical document later valued at US$13.
The raid, documented in Bruce Stirling's excellent The Hacker Crackdown, was the spur that led to the formation of the EFF. Mitch Kapor, founder of Lotus, was so enraged by the raid that he, John Gilmore (employee number five at Sun) and Grateful Dead lyricist John Perry Barlow set up the EFF, with funding from Apple's Steve Wozniak, among others.