Dan is right. Most people do not know what constitutes good manners with dogs. I can say from experience that AJ feels more secure when he's leashed and will act more confidently. Maybe I'm his security blanket. However, when people allow their animal to rush another that is leashed and try to say the dog is just being friendly need to review Dog Etiquette 101 and try again.
I think the main point here is to underscore the need for people to leash their animals until they are in a safe area for them to run. That woman in the business park is asking for trouble letting her dogs off lead. She is lucky all Buddy wants to do is play.
Maybe one day she will run into one of those Pit Bulls or Rotties or Aussie Cattle Dogs who will not put up with her dogs' behavior and correct it. Of course, then she will complain loudly to anyone who will listen and try to get a law passed to ban whatever breed of dog "attacked" hers when it rushed a dog on a leash.