I certainly agree that making shots that you are not good at at least border on the unethical side! So is not practicing at all, not sighting your gun in before every season, making longer shots than you know you can make, and my personal pet peeve, " it was a trophy-of-a-lifetime, i knew I didn't have a clear shot, but I tried anyway!"
"No shot" is a "NO SHOT" opening day, last day, doe, spike or trophy PERIOD!