No Problem Here. The act of shooting a deer whether its over acorns, feeder, or foodplot, is still killing a deer. We have limits to how many we can shoot and thats the key thing. So what does it matter what that deer is doing at the time its killed. Is it less sporty? Who's to say, we each have the right to deem whats ethical as long as its legal. Is a compound bow verse a traditional bow, verses a crossbow, verses a pistol, verse a muzzleloader, verses a rifle all different with different challenges and allow different hunters to enjoy their perfered method to enjoy what they deem enjoyable? I say so.
If we as hunters wish to debate whats ethically right or wrong with any hunting method thats legal, we essentially open up pandora's box upon all methods.