Not necessarily an "ethical" issue, but related - TAKE YOUR KIDS FISHING - If you don't have children, volunteer to take someone else's, i.e nieces, nephews, neighbors etc. Aside from introducing a new generation to the sport, I find that I'm less likely to act like a jerk if there are kids around. You know the "set the good example" stuff. Children will also tend to teach you a little patience, which actually can work when dealing with some adults!!