Lessee, I work with infectious cases for a living; I have seen more than one case of Legionnaire's, have seen presumptive Dengue Fever (3rd world environment, no lab available to confirm but we did discern it was not the hemorrhagic version), have worked for months with an active TB case wearing only a mask (I have a beard but save the PAPR unit for serious cases), worked extensively with a couple of H1N1 cases earlier this year.... Yeah, that's what I think.
When the public in general thinks of airborne diseases they are thinking of something that floats around until it lands on a surface. They think of something that can be exhaled. Ebola can be sneezed or coughed, but it can't be exhaled the way a cold virus can. The difference is in the way they settle in the body.
It may be splitting hairs to call droplet and airborne different. The healthcare workers that tend to active Ebola cases wear PAPRs not because they believe the virus to be airborne, but because a simple mask may not catch the products of a sneeze or cough, and even a tiny amount that finds its way into the nose or eyes could cause a life-threatening infection.