Take this one on the left. Sure, it could be argued that smoking is a slow suicide, as is any action a person takes that is not health-conscious: overeating, eating the wrong things, drinking, sedentary lifestyles, etc... but is guilt, fear and antagonism really the way to help people make better decisions?
In these cases, the ads are for good causes, and they're powerful enough to stick with a person for a while. But, are they actually defeating the purpose of the cause? I mean, what's the response? If I run half a load of laundry, is this image supposed to haunt me or simply capture my attention? More likely, it will make me think of all the natural resources a person must have wasted to create this campaign.
I agree that smoking is dangerous and that environmentally-savvy living is a good thing, and still, all these ads do is piss me off. If I were pro-smoking or thought global warming a myth, these appeals would not change my mind, but help me to disregard the opposition as extreme and illogical.
Some cool imagery though.