More broadly, I'm concerned that the civilization glue of community continues to be in retreat, lack of uniform mental healthcare and healthcare, and lack of reasonable bounds on who can/'t have firearms with similar respect as vehicular operation.

While that means I'm concerned about the same loser types Columbine that continue to be a problem (as mentioned), but I'm also concerned about organized domestic and international terrorists (including accelerationist, race-oriented, and religious groups) out to do much greater harm in ways that aren't just mass shootings.

Also, AI chatbots opens up the potential of automating sentiment manipulation through astroturfing leading towards radicalization goals.

Final qualitative observation: Functional, healthy civilizations seem to produce far fewer revenge-suicide events per capita per time interval.