The sharing of AIDS infectors isn't allowed, but you want to share data of people with mental problems.
HIPPA laws are important. But there needs to be a balance. Also, sharing info with police doesn't make it public.
People who work with children in CA and other states are required by law to report child abuse -- bruises, statements by the child, etc. At which time a social worker and police visit the home and look into it. Is this perfect, NO. Have millions of children been rescued from horrible situations. YES.
If a health care professional or teacher observes disturbing behavior and threats, when the police investigate, why aren't they allowed to temporarily remove guns IF CERTAIN CRITERIA ARE MEANT. Why are police not allowed to take preventative measures?
I believe one reason is because more that 60% of gun deaths are suicides and our society cynically sees this as "victimless" or a choice. Suicide happens when Major Depression or PTSD goes untreated. People who take anti-dresspents or anti-psychotics are not dangerous, when they take their meds and get needed therapy. However, when they stop therapy, go off meds--THEIR CHOICE-- if their behavior poses an obvious risk, then why don't we, as a compassionate society, intervene?