Unfortunately, whether they were on a continued regimen of medication or not, the majority of mass murderers seem to be taking or have taken one or more of these medications. That may be correlative rather than causative, but the potential for a link should be investigated further.
Of all the schemes the government has cooked up to spend the money we haven't been taxed yet, some of the most useful have been discarded--I'd rather the TSA budget was used to provide inpatient treatment for the most violent of the psychologically afflicted than groping people at airports, for instance, and I think it would do more to keep all of us safer--but then, the ugly problem of who decides who is sane rears its head.
I agree that those who summarily decry the concept of institutionalization may be a few brews short of a six pack.
The mental health “profession” is probably more worried about “Islamaphobia,” “homophobia” and other violations of Marxist groupthink than they are about real mental illness.