I have seen a FEW hunting scopes with sun shades, but most with them are tactical units. I hunt a good bit, and have taken my share of deer and have never had on spook from glare/reflection off the lens of my scope or binocs. Normally if they pass the binocs and on to the scope they aren't there long enough to notice any glint anyway! [:)] Not to say I don't take off my wedding band or turn my watch around, but I think glint is more likely of these surfaces. The only time I could see this being a big concern is if you are hunting facing directly toward the rising/setting sun.
Sun shades and the like are normally reserved for hunting things that might be hunting you back!
But I say just check out your environment and think about when and where and under what circumstances, and make the call for your self.
hershey