I don't like bipods because they add weight and are homely. I like shooting with a sling and am not averse to leaning against whatever is there. I don't like extreme range shots on game but do like long range target sports. I like the idea of using a walking stick as a support for offhand shots where there is no other option.
To me, the hunter who uses a bipod or any other support and makes good shots on game, is acting responsibly. He knows what he needs to do to make the shot. This is much more responsible than making a poor shot offhand. Using the best technique and the right equipment shows respect for the game. This is negated if one tries to shoot beyond the range where a good hit is reasonably certain (I consider "reasonably certain" to be in the 90% plus region). GD