It's pretty obvious that you don't have any understanding of psychology. When someone is suffering from mental illness at this level, they are constantly replaying the "plan" in their mind. This can go on for months or years before they act out. Top that off with the hormonal changes that are taking place in the teen years, societal pressure to fit in with ones peers (which has been exasperated by social media) and a dysfunctional family life.
At this point if I still had kids in their teens I would ban them from using any social media and limit their cell phone usage to when they are out to the movies with their friends or whatever the case may be. I probably wouldn't allow them to have a smart phone, just a simple flip phone.
You need to look in the mirror.