These feel like a technology that should be approached like mines, in that a breakdown in military capability or will conceivably leaves untold numbers of these

These feel like a technology that should be approached like mines, in that a breakdown in military capability or will conceivably leaves untold numbers of these roaming the depths (or sinking and disrupting habitats) without anyone knowing where they are or what they could do if you came into contact with one. It would be a not-good thing to turn the entire ocean into a Zone Rouge.