To be fair, we've had about a dozen (maybe?) mass shootings in over a century, compared to that in the last decade in the US. Plus, the early reports are that the weapon he used was a handmade gun. So, backyard DIY apparently for the win there.
A few people I know are talking about signing up for Gishwhes this year... "Greatest International Scavenger Hunt the World Has Ever Seen"
https://www.youtube.com/watch?v=CF0kpulllV8
For the oddly quirky one that people might be entertained by.. See What Happens when your face fantasy writers play Patherfinder
https://www.youtube.com/watch?v=zpt4_GpXWwE