New means of killing people doesn't really make large gatherings any less safe. Suicide bombers already blow up large crowds of people all over the world. The d

New means of killing people doesn't really make large gatherings any less safe. Suicide bombers already blow up large crowds of people all over the world. The drone and claymore is probably already less effective and more costly than the current methods of just holding someone's family hostage and forcing them into a crowd with way more explosives than a drone would carry.