That might make it worse. In Africa, the distance between the gutter and the water supply isn't very far nor clearly defined (bad water causes a lot of deaths in Africa already). And given that the Ebola virus causes people to literately leak, dropping them in the street may containment local water supplies. Plus, the Ebola virus can probably survive in wet but dead tissue a lot longer than in the open area. So each one of these bodies would become a mini bio hazard, until the tissue decays to the point that the virus dies.