Louie-Louie was actually the subject of a major obscenity hearing. But the judge ruled the lyrics were slurred and not perceptable, so the song was allowed to continue to be played on the radio.
It seems everyone has their own version of the lyrics, like some other songs:
CCR's "There's a Bad Moon on the Rise" vs. "There's a bathroom on the right"
Brooks & Dunn's "My Maria" vs. "Gonorrhea"
And, of course, Blue Oyster Cult's: "Don't Fear the Reaper" vs. "Don't Fear the Reefer" vs. "Don't Feel the Reefer"
And many more...