Give people a way to prevent malaria and watch them muck it up by being stupid.

Malaria bed nets' usefulness is their downfall BED nets intended to slow the spread of malaria are not always being put to best use: some Kenyans are using them to fish.
Insecticide-treated nets (ITNs) are a simple, cost-effective way to fight malaria and are distributed to pregnant women and children in Kenya, often for free. But when Noboru Minakawa of the Institute of Tropical Medicine in Nagasaki, Japan, and colleagues surveyed villages along Lake Victoria, they found people were using the nets for fishing or drying fish, because the fish dry faster in the nets than on papyrus sheets, and the nets are cheaper (Malaria Journal, DOI: 10.1186/1475-2875-7-165).
In Zambia too, ITNs are being used for fishing, straining fruit and even for wedding dresses, says Todd Jennings of non-profit health group PATH in the capital Lusaka. "An ITN in the water is one not hanging in the fisherman's home protecting his children," he says.
Someone really should do some more explaining when they hand these nets out. Sort of "If you use these as intended your kids wont die as often, so don't chop the bloody things up for wedding dresses you dumb bastards".