I actually hadn't heard much about pirate radio since the late 1960s until today when I saw an article about Alex Jones' pirate radio station which was shut down by the FCC. For people who haven't heard about pirate radio, here is a quick overview. Pirate radio is steeped in tradition (example here) and apparently it is still somewhat of a popular thing in San Francisco, on shortwave radio, and even on YouTube.
Digging a bit deeper, there is no shortage of information on the internet on how to set up your own pirate radio station (info here, here, and here). Needless to say, setting up a pirate radio station is illegal and the FCC will not be pleased (info here, here, and here). Fascinated yet? Find more info on pirate stations here, here, and here.