This really gets me annoyed, its the owners majority of the time that need seizing, i walk my dogs and regulary meet an owner with with a dog that isnt classed as a dangerous dog(i wont mention the breed in case of upsetting someone) and believe me we give it a wide berth i also regularly see a rottie and a staffy. The staffy and rottie are absolutely wonderfull fantastic temperement as the owners know the potential pitfalls with these breeds and have disciplined them, trained them and given them boundries, the small dog is a nightmare snaps, bites lunges on the lead because the owner sees the little one as not a potential danger so has not had the upbringing as the others, all dogs are a potential threat/danger if not trained or are in the wrong hands.