We’d all cry of we knew the truth.
I have a friend who works for a weapons manufacturer. A few years back, his company were working on some new sonar system. During tests in sealed tanks, they noticed that an odd substance was forming in the water.
Had it tested, turned out that the sonar was causing copper-cyanide to form - fairly poisonous stuff.
The research was then passed to another department to develop it for use in behind enemy lines situations - i.e. dumped in some poor country’s reservoirs.
That’ll be nice when it’s ready then.