This is a very touchy subject - the fact is that the Pit Bull was originally bred as a fighting dog. As such it's basic communication skills have been dulled. This is a huge advantage in the fighting ring as the other dog does not know what is going to happen. It is a major drawback for a pet.

I am not saying that these are "bad" dogs, many are sweet and will tolerate a lot of abuse ( also in their fighting genes). I am saying that this is not a dog that is a novice pet.

Another point is that this a trait of the breed for as long as it has been a breed - not a new trait. They are not nasty, do not have a temper and are not viscious....they have evolved to hide the signals and that is what makes them a danger - they don't "snap" or lose control - they just don't give any sign that they are on the way to snapping or losing control.