Earlier quoted context omitted.
> But the reality is that schools are a lot more dangerous than they were just 10 years ago. Do you have a source for this?
https://en.wikipedia.org/wiki/List_of_school_shootings_in_th... Compare 2000's to 2010–2014 to 2015 to 2019.
Keep in mind that the site was founded in 2001, was growing rapidly through the 2000s, and (along with much the rest of the Internet) saw a huge boost in use and access with the spread of mobile devices.
Inconsistency in reporting is a general problem with crime (and other human activities), with reporting rates rising and falling for numerous reasons. But a standardised crime reporting database would be preferable.