It genuinely sounds like these people were out of line and in a rather negative state of mind. You could have taken the same path as them and pulled over and confronted them, but I think you made the appropriate choice by continuing on and taking it to a ranger.
I encounter both bank fishermen and float fishermen almost every time I boat, but very rarely will I have anyone not wave and smile back. I give them as much space as possible, sometimes on Numbers it's not too much room....but everyone seems to be cool if you are polite (baring the random assholes like the ones you ran into).
The Sun shines not on us but in us. The Rivers flow not past, But through us.
- John Muir