Well, I've never heard of an airbrush that has a modulating trigger for airflow.
I just fired mine up to see if I could feel a difference in air flow with my Badger 100LG, and it sure seems to me that it is either on or off.
From the Badger website on airbrush information:
SINGLE ACTION refers to airbrushes on which the trigger controls only the air flow. The amount of fluid is regulated by turning the needle adjustment screw. When the trigger is depressed, a pre-set amount of fluid is sprayed
By which they mean on or off. I have a Badger 200, and a Badger 350 clone, and both require the needle to be pre-set, and the trigger operates whether the air is on, or off.
It would be analogous to compare an airbrush to a handgun, pulling the trigger harder doesn't fire the bullet any faster.
The only air control I've seen on an airbrush are the MAC control valves as offered by Grex, Iwata and others. paints.
I am also waiting for an answer from Ken at Badger for clarification from him on air flow control with Badger airbrushes, and will post when I have that information.
I suspect you are trolling to see what reactions you can get by arguing and splitting hairs. Begone Troll.