And it eliminates the statement " My dog has never bitten anyone before." Every dog bite should be reported. Does not mean anything should happen but there are very dangerous dogs and some owners out there.
Note: We had a very stupid neighbor move in a very aggressive German Shepherd. Their yard was about 6 feet from our backdoor and we had 4 young kids in the family at that time. No fence and once they tied the dog to the doorknob. Well, dog got loose, chased, and bit my brother. Dad took them to court to get rid of the dog or contain the dog with a good fence. Turns out the dog had bitten before and the owner just moved the dog to another neighborhood. After the court suit, the dog apparently was moved to another state.