Anti-smoking poster create to raise awareness of smoke-related issues.
For kids one: illustrate smoking itself as a demon, which evoke fear and imply that smoking is harmful.
For young adult: many thinks smoking is a act of coolness. I depict a scene of some "cool" elements; classy gentleman and the lighting, etc... and use rhetorical question to make viewers ponder upon the issue.
For the 70's: Create some sarcastic illustration to imply that smoking has bad consequences (just like suffering in hell).
For families that has children: Create sympathy by putting families into the drama. Implying once the damage has done, it can't be mended; just like the burnt photo can't be repaired back to it original status.