bowtech

How would you respond to the following situation? This is a description of my outing to Taneycomo yesterday. I am fishing approx 35 - 40 ft upstream from another angler. Someone else comes up, watches for a few seconds then begins to wade out into the current. He hollers, hold on for a few seconds so I can get through. At that point he wades behind the downstream angler and directly out into my casting and drift zone. He crosses the current and turns and faces me and begins to get his rig ready. Within 2 to 3 minutes here come his buddies, same thing. Now one is directly across from me 30 ft max and another is down stream 15 - 20 ft. When they finally get rigged up, they begin casting out into the area I was trying to fish. After a while the one directly across from me is casting to within 5 ft of me. What has happened to common courtesy. I realize that the river belongs to everyone, but give me a break. I was fishing this particular spot because it was crowded and this spot was available. If someone is already in or near the spot that I prefer to fish, I try to steer clear and find another spot, not walk through their casting and drift zone and then turn around and fish towards them.