You are 100% correct, all gear delivery 'types' have a small proportion of inconsiderate, rude and unsportsmanlike fishers. After 60 years of fishing, be it troll, cast, jig or fly, personnally I have found that the proportion of flyfishers that behave in that manner is slightly smaller than that of the others. Any flyfisher with an ounce of brain that insists on "solitude and a quiet delivery" (and I'm not one of them) would do exactly as you suggest...."GTFO to somewhere quiet and uncrowded" and they would "enjoy". On those occasions when I do flyfish I have no problem "sharing the water" (as you put it) with fishers using alternate delivery methods and I don't know any flyfishers that do so long as that fisher doesn't cast over top of the fly line or spook the fish with a 2 lb Buzz Bomb. "Salmon University" (or any species of fish) only needs 1 text book; it's called Articles of Faith for Good Anglers. It was written by Roderick Haig Brown for LIFE magazine. You can find it by Googling "Articles of Faith for Good Anglers-LIFE MAGAZINE 1960" All fishers should read it, asswipes included.