I remember learning about these many years ago, and just thought of them as a simple novelty. Now that I'm looking at them again, I can't help but wonder if the

I remember learning about these many years ago, and just thought of them as a simple novelty. Now that I'm looking at them again, I can't help but wonder if these could be, or have been, weaponized? Seems like explosive glass would be pretty harmful, and their behavior is akin to a "glass grenade". More of a historical question, since there's clearly no obvious demand for a weapon that requires the ability to produce glass in a world where chemical explosives are comparatively easy to obtain. But, I'm sure there are places and times in history where glass manufacture was practiced and the knowledge of and ability to obtain chemical explosives was more limited. Or, I suppose it might not be that dangerous. My understanding of "safety glass" is that by being tempered, it also utilizes internal stresses similarly to both strengthen the glass and ensure that, if broken, it breaks into smaller less harmful pieces rather than large sharp shards. So, I suppose it might make sense if it didn't cause that much harm, and was more like throwing sand at someone...