Should Students know the difference between the effects of Mandela and Meme?

One of my earliest memories of making persuasive imagery at school was one about not smoking and the other was on the effects of acid rain across european forests. Now, there are merits in both of these posters that, while they both are there to do good and teach the evils of the world to eight year old children, the sentiment behind both can persuade people to adopt the opposite of the message in hand. With selective imagery, careful copy and a poignant, catchy tagline the semi-believable becomes fact as if Groundhog Day shifted to April 1st.  You, too, will have made something very similar when you were at school while still innocent and malleable enough to get fully behind the not smoking lark and thinking acid rain was about to decimate that apple tree at the end of your garden. It never did. Clever marketing and that human urge to be attracted to knowingly dangerous activities still led me to take up smoking at fourteen; I still touch wet paint. Mind you, I still ride my bicycle to work because, you know, fossil fuels and my love of apples. And, should you have had the gall or the wherewithal to question such ideals, then you would be quickly put on the right track by your teacher. Today you would be lambasted online as a denier much like you would have if you were a Christian in Rome 2000 years ago.