well first let me say sorry about your mother,
but as you said it is reality and the reality is that if it takes these comertials to get people to stop then they should be a norm.
As you say "it is not fair to those who have lost a love one to lung cancer." could you also make a debate that any number of war-crime shows should not be shown on telivision so that people affected by it do not have to be reminded? (its part of life and we have to deal with it, not ignore it...)
I think that these ads help people more then they harm them.
"While it is reality, it is not fair to those who have lost a love one to lung cancer." (example) it is not also fair to have a family member killed by a dog, then watch a comertial about saving human killing dogs from being put-down
"This was during the day on public television, young children were most definitely subjected to this."
would young children would not be watching the channles they play these comertials on? I'm not sure compleatly but i think this to be the case...