Boone and Crockett -
http://www.boone-crockett.org/huntingEthics/ethics_fairchase.asp?area=huntingEthics
FAIR CHASE STATEMENT
FAIR CHASE, as defined by the Boone and Crockett Club, is the ethical, sportsmanlike, and lawful pursuit and taking of any free-ranging wild, native North American big game animal in a manner that does not give the hunter an improper advantage over such animals.
HUNTER ETHICS
Fundamental to all hunting is the concept of conservation of natural resources. Hunting in today's world involves the regulated harvest of individual animals in a manner that conserves, protects, and perpetuates the hunted population. The hunter engages in a one-to-one relationship with the quarry and his or her hunting should be guided by a hierarchy of ethics related to hunting, which includes the following tenets:
1. Obey all applicable laws and regulations.
2. Respect the customs of the locale where the hunting occurs.
3. Exercise a personal code of behavior that reflects favorably on your abilities and sensibilities as a hunter.
4. Attain and maintain the skills necessary to make the kill as certain and quick as possible.
5. Behave in a way that will bring no dishonor to either the hunter, the hunted, or the environment.
6. Recognize that these tenets are intended to enhance the hunter's experience of the relationship between predator and prey, which is one of the most fundamental relationships of humans and their environment.
Should we use food plots? Scents? Calls? Decoys? HD camo? Spotting scopes? Long-range rifles? Tree-stands? Is using bait in a trap line ethical? Do any of these tactics give the hunter "an improper advantage over such animals"? How about if the hunter is physically challenged? Should ethics change depending on the circumstances?
I know writing these questions will most certainly make me look like a jerk to some people. Don't take it that way. I'm only pointing out that it's hard to draw a line with this. It can make for interesting or heated debates though.
I say keep it legal and respectful. Beyond that, use whatever means you need to to keep it ethical in your eyes and don't look down on how others hunt. I do not bait (whitetails). I have a friend who hunts in lower Ontario. They have to bait or they'll never see deer. I've strongly considered baiting for disabled guests while I had a non-profit hunting and fishing business.