If you maintain control at all times, fine. Too many owners don't. I never let my Lab loose except in the fenced backyard with me or wife watching her. She loves children too much. At 75 pounds she could seriously injure a child just running to greet them.
It's all about responsible ownership, most dogs are predators by nature, they should be treated as such.
A disciplined dog is a happy dog, dogs are pack animals and they have to be shown who the leader of the pack is. Bella will do tricks til she passes out just make me happy, she wags her tail so hard when I come home it often smacks her in the face (she has neither tail nor ears cropped). I don't doubt there are some bad APBTs out there, but it's the fault of the owner/breeder. I love my dog and hate to see her get a bad rap.