Hey Zaphoid,
Not to say that some rivers are bad rivers, but there are a few particular rivers that recieve more morons simply because of their location, and because they have more fish that other rivers.
I used to have the perception that the only way to salmon fish is to be around fighting red-necks, but the more you fish, the more decent people you meet, and the more rivers and locations you find. I came to realize that there are far more locations without idiots than with them.
Also, everyone has the ability to fish the rivers, some exploit this right more than others and trash them, there aren't many of them, but many of them seem to have additional ideas other than just fishing...
Don't let it put you off, just go out and see for your self, there really is some great fishing to be had