They used to say the same thing about Dobermans and Rottwielers, but those two breeds are actually very smart and great family dogs, they're really friendly, but the key is the handler. Pit bulls can make excellent pets, even for families, but it all depends on the handler. If the person who owns the dog and trains it, doesn't know what they are doing, obviously the dog is gonna be screwed up, no matter what breed it is, if it's not properly socialized and trained, then it's going to be dangerous, even border collies and golden retrievers can be viscious in the wrong hands (believe me I've seen it), it's all about the owners. So my answer is: No they should not be illegal or destroyed, people need to smart up. Maybe stupid people shouldn't be allowed to own dogs.