I wont post about distance or upstream vs downstream,but I find the best thing to do is comunicate with other anglers....asking someone if they mind you fishing up or down from them is the best way to avoid any unsaid feelings.....imop
I fished the Liv one day last year and saw every color in the spectrum of ignorance from people, on the flip side I also ran into a member on this board the same day who changed my outlook on how I appoach people on the river.He came up to me, after I looked back to find him behind me ,and offered his opinion on how to fish the hole I was at and to tell me what he was having sucsess with that day.....it was a breath of fresh air and has really changed how I talk to and listen to other anglers out there doing what we all love to do.....