So you have shot a squirrel nest?
very early in my hunting years... (15/16) yes, and as jimmyray stated, was unsuccessful each time and only happened as a result of a slow outing... now that I have learned from my early immaturity, it wont happen again. It is a waste and, essentially, just wrong.
also as stated above, survival hunting is a completely different beast altogether... you do what you can, how you can, when you can.... even in such an instance, shooting at something you cannot see and do not know is there is wasteful... Still not a shot I would take.. I would be hungry for another day.