And I thought I remembered reading that they could be a breading ground for bacteria...?
I like the Dyson Blades but I've never found any other that actually, you know, dried your hands... 
Pafos airport has removed all its paper towels allowing us to 'take the green' option of using the (pathetic) hand dryers... Surely, using towels made out of recycled paper which can themselves be recycled into more recyclable towels must be more greenerer than using an electric noise making machine that leaves you with wet hands that have to be dried using Miss D's preferred method...? 
Exactamondo BM 

Dyson air blades take the liquid on your hands and disperse it around the vicinity for others to inhale. Might be tolerable if everyone washed their hands properly or the soaps they use not include the evil
Methylisothiazolinone that causes human tissue to fall apart in ~ 1% of people.
Air Blades are good for making deafening whistling noises if you angle your hands right