In some cases, say EPA, its absence will still have people up an night worrying about a different set of idiots. People only act to help the common good with a gun to their heads.
They are good developers. Just pump out byzantine code that works great until you try to understand it. My buddy at work comments a lot explaining "Why" he is doing something and got docked in review for "cluttering up" the code.
Was told by a dev that policy is to NOT comment code a lot as you can just read through the code. Wondered if they knew this code needed to be maintained, though that would explain the state of the application....
Grinding along in Saboteur. Very much like Just Cause, but is still fun. Also spent some time in Overwatch comp, almost 2k rating (I guess people are really garbage this season)
Couple of mass shooters end up being fans over the years.
As for mental illness, not sure it is likely to be the same, or at least not more likely than it being higher throughout history. Would be interesting to see, but doubt anyone would check