Dying - and killing - for a cigarette

I gather that the health benefits of banning smoking in Scotland are proving to be pretty unequivocal. I do feel that this situation should be compensated for (in the interests of ‘balance’, perhaps) by someone’s health being substantially lessened.

How about the cigarette manufacturers – and how about a couple of decades in gaol for each of their directors? After all, they have known for decades that they were killing their customers, but carried on regardless. As we have had laws against knowingly killing people for quite a while now, exactly why are any of these venial, callous, inhuman monsters is still walking the streets?