Due to emotion rather than fact, school shootings receive attention far out of proportion to the actual risk they pose. People admonishing everyone to think about the children would be doing a far greater service focusing on automobile, bicycle, sports, and swimming safety than this. Here are the numbers:

https://news.northeastern.edu/2018/02/26/schools-are-still-one-of-the-safest-places-for-children-researcher-says/