If I have them in my pack, which I try to keep a pair or two, I will use them.
If not, I don't sweat it too much.
I do it for disease prevention, parasite prevention, ease of cleanup for me, and to prevent myself from getting diarrhea (sp?), which I have noticed on more than one occasion happens within 24 hours of cleaning and processing a deer.
So obviously there was some sort of tiny bug of some type that got into my system, and you can take that as you will...nothing drastic, just enough to let me know I got something in my system that was "not right".
More than likely, it was just some microbe riding around in/on the hide of the animal, and not necessarily something internal to the deer.
Oh, and after it's hung, and skinned, I don't wear them while I'm processing the deboned meat.
See Ya,
Marc