There, I fixed It: Billboard Liberation Front Helps Exxon With Its Messaging (1989)

After Exxon apparently failed to take sufficient responsibility for dumping 11 million gallons of crude oil into Prince William Sound, San Francisco's Billboard Liberation Front decided to step in with an assist. A group of BLF pranksters changed the messages on two local billboards from "Hits Happen-New X-100" to the crude paraphrase of the oil company's explanation of the accident: "Shit Happens-New Exxon."