1. The actual bad-boys and bad-girls of
Rock'N'Roll. They play themselves in the supermarket tabloids (Example: Amy Winehouse)
2. The actual inhabitants of Rockville, Maryland; Rockville, Indiana, Rockville, Utah; etc. (also spelled Rockvillians)
3. The famous inmates of Alcatraz, San Francisco, California,
USA, the famous federal prison also know as "the
rock" Example: Al Capone was a RockVillain)