So everyone is punished for a bad actor? This is harmful, yet inefficient. It doesn’t create wealth. A right is a covenant that makes you responsible to everyone. Each of us has a right to life. To maintain mine I must maintain yours. Therefore, yes, buy a gun in the service of life. 

Ethical people, people without mental instability, don’t do things like this. 

What is the root cause? I don’t know, but my guess is the food and drug industry have become corrupted by greed. Name one drug that actually cures something and does not cause a secondary harm. Even antibiotics do damage to you. Name a processed food that is actually nourishing. What inspires the greed? Money, that by its nature, loses value. Companies must, through intended and unintended fraud, seek to beat the constant devaluation of the measuring stick that is money. 

Then there are the collectivists. 

If you haven’t read The Fountainhead or Atlas Shrugged, I highly recommend you do.