Just so you know, I was employing sarcasm. If you are covering 70 yards of water in less than ten minutes, you're doing it wrong. This applies as much so on smallest waters as big ones. I know some may disagree, but that's your privilege.
What probably happened was the "intruder" dropped into the sweetest spot in the stretch, simply because the other entitled angler decided instead of going to where he wanted to fish, he decided he was entitled to the entire stretch and he would fish over the questionable areas first, building his anticipation of the sweet-spot.
If there were any other anglers on the water or to be expected, his tactic was as selfish as any that could be attributed to the encroaching angler's.
One thing I try to do if I think my presence in sight of another angler will disturb him or her is to approach first and engage in conversation. You might explain how far you have walked to find 75 yards between anglers and that you know the upper portion of the pool is great and you want to fish it, unless he had designs upon it, in which case, you would defer to him moving upstream and allow you to ply the lesser water and fish behind him. If such an approach were rejected, then I would politely say that I was trying to be helpful and that under the circumstances, I will be stepping in 70 yards upstream and will wade carefully so as not to disturb the water beyond reasonable need.
