All dogs regardless of the breed require daily exercise, socialization and training. Too often the cute little puppy pulls at the heart strings and it gets brought home, but the novelty wears off and that puppy is left to it's own devices.
Dogs are pack animals, their owner must accept the role of "Alpha". If the owner does not take that role, the dog will and then you have problems.
Irresponsible breeding has done a lot of damage to the reputation of not just Pit Bulls, but other breeds as well. Put that together with irresponsible owners and it's a recipe for disaster.
Kids don't raise themselves, when we see or hear of kids that are out of control and getting into trouble do we blame the kids...or do we look at the parents? Kids aren't born bad, neither are dogs.
Pet ownership takes time and patience but, the outcome of having a balanced pet is worth the time and effort.