I also agree that fishing and deer hunting are very different. I also do the same as you when I fish, it is very true that some of the fish that are caught & released do die.
I agree that it would be hard to police dart hunting, plus if a person were to hunt that way they would have to know something about the effects of the drug on the animal. Like I said I just wondered what people thought. I personally hunt for the meat, and if I get lucky enough to kill a deer with a big rack then that is just one of the things that give joy to the hunt.