Do you smoke?

I don't smoke and haven't tried it; for most of my life, I lived in an apartment with smoking neighbors. Now, even a slight smell of cigarettes (especially cheap ones) makes me nauseous and gives me a headache. In general, I don't want to offend anyone, but in my opinion, smokers are people with weak willpower who are addicted to this habit. Of course, it's clear that smoking harms their health, but the fact that smokers harm those around them is what's upsetting!