It is not only long liners upstream, But as I found out last weekend it is also long liners casting way upstream. I lost one fish on the the
cascade river due to one particular individual
who repeatidly insisted on casting excessively
upstream across three other fishermens lines including mine. Then instead of keeping a tight line to his float, he would let is line lay slack in the water over the top of the rest of our lines. A little common courtesy goes a long way.