Once a terrible method of mass destruction is invented or discovered the long term potential for horror is infinite.
In world war one poisoned gas was used, and a hundred years later the potential for horror is still there.
In world war two the nuclear bomb was invented and used, and now countries across the world possess weapons that can end the world.
We’ve seen IED’s and suicide vests, made from household items, which will now be a tool of any ignorant Looney.
Now we have drones, not just the big ones run from thousands of miles away, but also the $500 models that can be used for any number of crazy attacks.
And now we’re quickly entering the world of cyber weapons which in our totally connected world can be incredibly dangerous.
Once a weapon is created is cannot be uncreated, ever.