Really, these two patients whose transport and hospitalization is being scrutinized to a higher degree than any other two people in the world are "putting everyone else at risk"? I don't buy that. And if something bizarre happened, like an aircraft or vehicle crash, the area would be cordoned off immediately. That's how we do things in this country. You would not see little kids picking through the wreckage like you would in Africa or parts of Ukraine. And there is already Ebola in this country in a few labs (we hope not in general travelers).
Because we can surely trust the CDC to handle their pathogens in an appropriately safe manner:
http://uk.reuters.com/article/2014/08/02/us-usa-healthcare-cdc-idUKKBN0G201A20140802