Quite a story Fin.
Like many on here, I am not a fan of pitbulls. Even if we put aside the fact that they are more likely to flip a switch and go lizard brain on a person, I think what they are capable of is reason enough to not own them or want to be around them.
For argument's sake, say you do trust an individual pitbull as much as you have trusted any dog. I still wouldn't let that dog around my family, if only for the reason that if they flip the switch, it would only take a moment for that dog to rip the throat out of a kid. It's what they are capable of compared to other dogs that gives me pause as much as anything. Whether you have a cocker, a lab, or a pitbull, you'd be a foolish to think they could never crack in a moment. People crack, and I trust people more than any given dog. Even my own lab, who lets my toddler son poke her in the eye, kick her in the junk, and tug on her ears with nothing more than 100% pacifism, could lose that part of her brain that regulates restraint.
When I was 6, a German Shepard tore the right side of my face off. We were over at a friend of my folk's house and I went over to pet it. It wasn't used to children and put my head in it's mouth. Dozens of stiches later my cheek was reattached. I will forever have the scars below my eye and on my jaw line where its mouth closed down on my face. Wierdly, it didn't really effect my feelings about dogs growing up, but when my son or daughter tries to pet a dog I don't know, I find myself inching closer and becoming tensed up, always making a plan for my own attack - even with my own sweet and motherly lab.