Fishing etiquette is not so obvious to some. When I first went to a crowded river I was advised not to go upriver of someone, not to go across someone, don't go downriver, and get out of the way with anyone with a fish on. I walked into the river, many fishermen, no holes, looked at the last fisherman on the river and figured I should go past him. People were 300 yards apart but I was worried about being above anyone. I fished and found no one concerned as it wasn't a "hole". So, some are new, some are ignorant, and some are jerks. Too bad we all don't wear signs!