I bet that "youth of a nation" ad is just pushing for more gun control civilian diasarmament and other erosions of freedom under the guise of mental health.

If stopping school shootings is something you care about, here's a simple tool you can freely copy:

Ask questions to each student to screen for issues that are correlative with would-be school shooters: Do you have classmates or other people at school that care about you? Do you feel that teachers and/or other school staff care about you? Do the people you live with care about you?