Lusitano, anything you smoke can and will give you cancer, and lung or throat cancer has nothing to do with family genetics, as other types of cancer.
I think you're confusing a bit the healing property's of hemp oil with mj intake, two different things all together, really.
It seems that few that have tried the oil as a daily medicine, and many others insist, that hemp oil kills damaged cancerous cells and at the same time rejuvenates new ones.
But the answer to your Q is, Yes, smoking mj is hazardous to your health.
