Let's say we had someone with active ebola who was refusing quarantine. How do you suggest we round them up? Tranquilizer dart?
Clearly, the chance of surviving ebola, and keeping from exposing family and friends, hinges on quick treatment when symptoms show up. You seriously think a person who came down with ebola wouldn't be rushing to the nearest hospital the very first instant that symptoms showed up? To me, that makes no sense to even use as the basis for what-if's. Those who are "at risk" are aware and undoubtedly super vigilant, just as we all would be.