Whenever I see Rottweilers in movies, they are portrayed as big bad dogs - usually belonging to the villian! I think people associate even just the Doberman/Rottweiler markings with "mean" dogs. My first dog was a mixed breed, probably shepherd/Dobe or Rottie, with the classic Rottie markings, and though she was a sweetheart, people were afraid of her at first sight. Did keep door-to-door salesmen away, though!