People who I know:
Family A is a great family. They had their eldest son involuntarily held for evaluation after a suicide threat. Dad said to me, "We can't lose him." Kid turned out OK, currently serving in military, no ill effects from their parental concern.
Family B had issues. Son made online threats about a school shooting/suicide. I became aware and as a mandatory reporter, I called LE in their area. Kid got a psych eval, and a bunch of other shit. Mom confronted me for reporting, and when I asked her how she would have felt if he had shot up the school and then himself, she said, "He would never do that, He didn't mean that." AFAIK the kid is OK as an adult, and both their kids stay as far from the parents as possible.
My friend loves his son enough to do the hard thing rather than risk losing him. I have no sympathy for the Crumbleys or anyone else who ignores warnings, threats, or pleas for help.