Scary scenario. One sad family's story to bring it to the Public's attention. Must be on the order of uncleared mine fields abandoned after war. Women, youth, and domesticated animals are the unintentional recipients.
Targeted species eradication devices of this nature, imo, should never be used near housing as the devices are never going to be 100% fool proof. Every adolescent and teenage boy with a thirst for the outdoors, and that would be a number in the millions, is going to investigate the woods near their homes. Finding something in the woods of an "unusual character" is going to be investigated. The family dog is going to investigate too. A Boy and His Dog (you know)...
Growing up near Florida phosphate mining in the 50's, where TNT was used to open pits, I remember the daily TV advertising with regard to Blasting Caps showing us types that were used, basically what they looked like, and to Not Touch - Get away - Tell an Adult. These ads and their message were the precursors to NRA's Eddie Eagle campaign for children's gun safety.
I recall the railroad torpedoes, we would find them on occasion and mess with them.
In fireworks training classes we were encouraged to be out the next morning after a shoot to pick up the unexploded ordinance before the kids who watched the show the night got there, cause that's what we did when we were their age!