Well, you may not think your a hero, but to Thumper you are. That's all that matters.
I don't like the pitt bull misconception either. I think they have a tendency to be more aggressive than most other breeds, but with proper training, love and care,i think that can easily be overridden. Certain breeds have specific personality traits (like irish setters are supposed to be veyr high strung), but that doesn't mean that the entire breed is like that. I think aggression can be a fairly simple thing to crub from a young age.