When are people most likely to relate to others’ sanitation problems? When they’re feeling the urge to relieve themselves of course!
Imagine if awareness/action-raising stickers/posters were placed on the inside of public toilet stalls in the developed world (from restrooms in schools to libraries to restaurants to gas stations; the possibilities are endless). As the toilet user reads the material to be distracted from the task at hand (just like people often have household bathroom reading material, or, in the case of some public toilets, check out the random scrawled phrases and pictures), they learn about sanitation issues elsewhere in the world and are referred to text a # to donate to help build hygienic, environmental public toilets where they are needed most, or for more information.
A similar campaign could also target tourists at the airport returning from countries with less developed sanitation systems. Please see below for example campaign text.
Image Attribution: http://xkcd.com/229/