This seems to be an epidemic. Your out fishing with your buddy who is standing about 15 feet from you. All of a sudden in come a group of lets say four guys. There is about 300 yards of river above and below you that is not being fished, plenty of room. Within minutes out of the corner of your eye, you notice one of these guys eyeing the spot between you and your buddy. They watch you to see if your looking at them, and when you not looking at them, they inch forward, then when you turn back to acknowledge them, they stop inching forward. Before you know it, one of them has slithered into the gap between you and your buddy...I finally had to tell one of them he better not stand there, cuz my buddy (who was to my left) casts right handed and I cast left handed. He must have noticed that as he was wiggling in between us, and surely he would have realized we would be casting and hooking the back of his a$$ all day if he stood there. I even had to take a leak at one point, so I put my rod down, and walked away to a bunch of trees, I wasn't gone 30 seconds and I come back and another guy had wiggled into my spot...I know the river doesn't belong to me or anyone for that matter, but there is definately a lack of common courtesy out there