Cigarette packets used to have little warnings on. Then they had big warnings. Now they have pictures of what damage smoking can do. If these measures really had such a drastic effect, nobody would smoke.
But it's an addiction, and implying that smokers don't understand what damage it can do is insulting, IMO. All smokers know that it is bad for them, but I think they choose not to think about it.
And as bubalou wants us to disclose our smoker status, I'm an ex smoker, quit numerous times, including in pregnancy. Apart from when, whilst 6 months pregnant, my much loved Gran died and I felt the need to smoke (and have a drink) at her funeral. You know, because I was an addict. I also didn't find out I was pregnant until I was 13 weeks, and had smoked plenty up till then. I had enough guilt over that from myself, I didn't need people telling me how selfish I was and that I didn't deserve children. What I needed was a sympathetic MW who offered me help to quit, rather than shouting abuse at me. I didn't need to be shown pictures, or told that I should have my child taken away from me.
And look, incentives have been shown to help pregnant women stop smoking. And that's the opposite of calling them selfish and whatever other stuff you've been saying. So which method do you think is the most effective?