I'd rather have a pet that doesn't scratch me every time I come close to it, or try to take a bite out of my heels when I walk past - or one that doesn't look like an oversized rat. Honestly, pit bulls are great - my dog is a bit larger than a pitbull, but he's the most tolerant dog ever. He lets the little tiny chihuahuas hang off his jowls if only to keep them entertained (which often hurts him, but he never complains) and willingly allows the little babies of our family slap him in the face (accidentally, of course - but it still happens.)
Honestly, big dogs are great. People fear them, which kinda sucks since people almost let my dog get run over by a truck because they were scared of a thirty-pound 'pitbull' puppy, but they're the sweetest things. And they're lazy - and know their limits.
Aggression isn't in my dog's nature - I should know. he was tolerant of the young children from the very beginning and never bit us - he only gave us low growls as warnings. His brothers and sisters were the sweetest little dogs, and didn't so much as nip us as we were looking for a puppy. And I don't think he could ever be an aggressive dog.
Some dogs may have the tools to be dangerous, but, just like humans, most rarely act on these impulses alone. Honestly, if you made the average chihuahua dog or cat a bit larger, you'd have a more dangerous animal than a pitbull or Doberman. Those guys tend to be kore aggressive, but since they never cause harm, we don't mind them.
I find it crazier that a person would willingly let a pit bull, Doberman, Rottweiler, or any other type of large, 'aggresive' dogs die because of their idiotic fears - especially when they're still puppies and adjusting to their environments. It's happened to me before, and it still sickens me to this day.