With bots making up 70+% of the volume that’s “flip of the switch” easy to do also. Talking up a panic is pretty tough now, but you pull 70% of any given days volume and the indexes are going to look like wily coyote just before gravity takes the wheel.
Speaking of finding what you seek, NPR this morning, "Threats Against Schools Increase Since Florida Shooting"
"Year of the shark" effect in play. The rate of reporting does not reflect the rate of occurance.