I believe this is very much a personal thing.
I would not hunt in a fenced area, as I would not feel I have actually hunted a ' real ' wild animal.
Water holes ? I was brought up to respect animals at water holes, and thus will not shoot at a water hole.
Having said that, if a hunter chooses to do the above, that is his choice, and far be it from me to try and tell him otherwise. To do so, would make me no different to the antis
ie.. forcing my opinions on others.
M.