EFF: A History of Protecting Freedom Where Law and Technology Collide

The Electronic Frontier Foundation was founded in July of 1990 in response to a basic threat to speech. The United States Secret Service conducted a series of raids tracking the distribution of a document illegally copied from a BellSouth computer that described how the emergency 911 system worked, referred to as the E911 document. The Secret Service believed that if "hackers" knew how to use the telephone lines set aside for receiving emergency phone calls, the lines would become overloaded and people facing true emergencies would be unable to get through.

One of the alleged recipients of the E911 document was the systems operator at a small games book publisher out of Austin, Texas, named Steve Jackson Games. The Secret Service executed a warrant against the innocent Jackson and took all electronic equipment and copies of an upcoming game book from Steve Jackson Games's premises. Steve Jackson panicked as he watched the deadline come and go for his latest release and still hadn't received his computers back. He was forced to lay off nearly half of his staff. In the end, the Secret Service returned all of Steve Jackson's computers and decided not to press charges against the company, since they were unable to find any copies of the E911 document on any of the computers...

https://www.eff.org/about/history