I am always amazed at how many people are scared of dogs. Most of mine are on the medium side but I have had people scared of Oreo who only weighs 25 lbs. So I can imagine what people who see GSD's running at them are thinking. We fenced in a small area of our yard so the dogs would have a place of their own and it has worked out well. I agree that training would probably help because you could probably come up with some word that would make them realize that their approach to invited guests could and should be different. But I also think you should fence off an area that is just theirs where they cannot always reach people who are approaching your home.

With these days of people who love to sue, it might be in your best interest to do this so no one can find a reason to sue. After all I would imagine that it wouldn't have to be a bite to sue - it could even be someone tripping and falling in their haste to get away from the dogs.