There are commercially made anti-fog solutions which help to reduce fogging...
You can even have lenses made with an anti-fog coating (although you still need to apply an applicator periodically to the lenses).
A good anti-glare (AR) coating on the lenses will reduce fogging... A cheap AR coating will often increase fogging on lenses.
If a turkey sees that beard hanging out of the bottom of your mask, and decides not to come in due to that, he probably deserves to live anyways... I have stated in other posts, that I believe that I could hide in a bright orange care in the middle of a pasture turkeys were using, and they would come right in (as long as they do not see you move inside the car).
I believe turkeys are extremely sensitive to movement and unnatural sound... I believe that picking your nose at the wrong time could prevent a bird from coming in, as well as I believe that at least with some birds that "whispering" to a buddy about an approaching bird could prevent the harvest of said bird.