Toddler ociating with the bad guy....?

lol my son spent the whole year he was three being a mean meat eating dinosaur (He didnt really watch super hero or dora kind of things he really only liked dinos) He would go around and 'eat' us or growl at his little sister till she cried. He did get time outs for some of i but for the most part he was just playing. I would just keep reminding him when he does stuff like that he isnt being very nice and that not nice people dont have friends. I know swiper almost didnt get christmas because he was that migt be a good one for him to watch then you can referance that about how he is being nauhty. I really wouldnt be to conerned about it at that age.