These "farmers" and "workers" are producing a poison specifically designed to addict and ultimately kill the user. They are directly responsible for countless millions of deaths and untold misery around the globe. These "farmers" don't deserve to be pitied, their "family business" needs to be utterly destroyed.
As far as what happeneds to them afterwards, NOT OUR PROBLEM. Let them learn to work producing something benificial to the world instead of deadly poison. If they can't or refuse to do so then, let nature take its course. Again, NOT OUR PROBLEM.
Only about 1% of US heroin comes from Afghanistan through Canada.
Nearly all our heroin is grown and processed in Mexico.
Would you recommend the same treatment to Mexico?