All of my current roosters are nice right now. But I have had a few in the past that were not. The first that comes to mind is my 'kick me' banty rooster. He would run after be and attack me again, and again, and again. Each time I would kick him away and he would just keep coming. I eventually had to sell him because I didn't want him to attack one of my fruitstand customers.
I also remember an evil rooster as a child that would attack people. But the rule was that anything that attacked my Mom died. So he became chicken dinner.