Reminds me of the golf ethics question: your opponent has driven his ball deep in the woods---you help him look for several minutes then go to your own ball in the center of the fairway...
just as time is about to elapse, you hear "found it"--and seconds later a shot comes out of an opening and lands pin high 10' for birdie...
the question: do you tell the cheatin' bastard his "lost" ball is in your pocket? :-)