Well, it eventually took my new dog trying to kill my older dog for my family to start listening. Truth, they still don't always, and I resort to what I've always done, REMOVE MY DOGS! If THEY can't listen to me, being MY dogs, they all go to their corner. Living with a dog who has serious issues, and another who instinctively believes it's her job to control that, can be a challenge when the people around you think they know best. Now that they realize the way they handle the dogs when the dogs are having a differing of opinions can make or brake the situation they have been listening to me more. Just this morning I had to low and gruffly command my mother to "stop talking to him like that" referring to the way she was verbally "correcting" Jin for nasty growling at her. If I hadn't have stepped in, End may have launched herself at him to "finish the job", instead my mother stopped and I whistled to Jin and he calmed down, and was able to settled when not harassed or perused or even "noticed" for his behavior and everyone got breakfast shortly after.
Yes, sometimes it take one tragic event to finally change some minds, and that's the only way they learn. "Well, I've always texted while driving and never had a problem, it's just scare tactics!" Says the person whose friend will die the next day from that activity. Humans are stubborn by nature, and sometimes you can only just go so far in educating, when someone just doesn't want to listen or hear it they wont no matter how loud you scream or how yummy you sugar coat it.
Best advise I can give, again, if there is a serious problem "remove the dog", it's not worth it, and it can be easy to do. You can train the dog in your spare time to "go to a spot" like a bed in another room or crate, make it fun! And when there is a family problem, command the dog, and hopefully problem solved. This of coarse will not work in all situations, such as on family walks or outings, but maybe if you put enough work into, training the dog to "go to place", your family might also start to see that "you really have something there, I'm listening now, show me more!".