American Social Hygiene Posters
"Shmafty" is awfully chipper.
"clover" clears up a lot of misconceptions with this highly informative image:
"guvnor" does his best to shine the light of knowledge into the darkest depths of ignorance:
I don't even know. But Zack "Gobstopper Entropy" Parsons made this.
"Washuu-Chan" is direct and too the point.