I'm here not to report a bug, but to give an idea on to implement an feature to the game.

Also, i'm not sure that this feature is allready in the game or if it will come in the BETA release.

That feature would be as follow:

For those who have Joysticks(like the ones used for Flying or an Dualshock) there should be an feature that automatically activates the joystick when the player enters a car or an Chopper/Plane.

i.e.:
The player is using the keyboard and mouse to play on foot as an soldier.
The player has an flying joystick connect to one of his computer's USB ports. The player then enters a chopper or plane.
With that feature activated, the game automatically enables the joystick so that it can be used with the chopper or plane and deactivates the keyboard(or not).
After the flight, the player exits the aircraft thus desabling the joystick and enabling the keyboard once again(if it was disabled).

That would be an great add-on to the game and would really help making the game an better war-simulator.

If you agree with me and think that this would be an nice setting to have in ArmA III, up-vote this Issue and maybe someone will take it into account.

Thanks!