Sorry about your trip to the park. We dont have a dog park locally, but on occasion I will travel 25 miles or so to take my dogs to the closest dog park. I usually only take Darmok and the little mojo, Lucy, because Dar can and does get along with all breeds, sizes, and sexes of dogs. Sasha, my other dobe, is not quite as 'social' and I dont take her for the very reason you are describing above. I'm pretty sure that she would not start a fight with another dog, but her personality is the type that if an argument between 2 or more dogs happens to be going on, she would be more that happy to join in! I have to take her to the ball park and let her run for exercise when she gets bored with our own back yard. Dar has been around dogs that disagree with each other about one thing or another, and she just looks and walks off. I think that people are aware of how their own dogs react to other dogs, and if their dog cant ignore a fight, then they should keep it restrained or leave it at home.