How you doing boys! First post here, hopefully not my last, we'll see how the response goes.
I've been lurking here for the short while that makes up my fly fishing experience (all of about 2 months). I've learned a lot here but I've never had anything to contribute hence the reason for never posting. However, this is a topic that we can all likely chime in on, and that I'll do.
I'll preface these comments with the fact that while I've spent my entire life in California, I was brought up fishing, hunting and enjoying the outdoors since before I can remember.
As a whole, not individuals, I believe the population of fly fisherman are largely perceived as D!cks. Maybe that's not the best description, lets go with elitist instead and I'll rephrase it. I believe that the majority of the non-flyfishing fishing population perceives the majority of those in the flyfishing subcategory of the fishing population as elitists. That's better. I don't think that's an unreasonable statement or unjustified in any way. Now we've all heard comments from flyfisherman (before and after taking up the sport) that were meant to lead us to believe that flyfishing is a more honorable, skillful, brilliant, magical way of catching fish in an effort to seemingly discount all other methods of take and which may or may not be an attempt to elevate the individual to a higher rank of outdoorsman/manhood than those around him. That may or may not be the intention of those making such comments but the perception of those hearing them has little effect from good or bad intentions.
Now with this in mind, and with the fact that those on this forum are far more clue'd in to the world of stream fishing than most of those fishing the Bishop Creek drainage, I'm going to suggest that your handling of the situation simply increased their bad perception of fly fisherman and did little to teaching any of them proper etiquette. Again, whether your intentions were good or bad, the story that kid and his dad will likely tell is of an elitist fly fisherman that chased them out of their favorite hole that they drove a minimum of 5 hours to get to. Right or wrong, their idea of stream fishing may center around that one hole, where as you clearly have a much wider and clearer view of the fishing possibilities located in the vicinity.
I'm not suggesting you're an elitist in any way. In fact I was fishing just down the creek from you in Aspendell this very weekend, and while fishing a nice little hole (that we later found out had a nice Alper in it), a teenager who had likely never fished in his life, jumped up on a rock on the other side of the creek from me and while putting more salmon eggs on his treble hook shouted, "catch anything!"
I wasn't happy either, but it's a long creek and I just asked him if he wanted to fish there and walked up the creek to where my brother was and laughed about the kid that doesn't have a clue. It was wide open fishing for me that evening and I never saw the kid catch a thing but he was having a dang good time enjoying his new experience and may have been having more fun than me.
I'll say this, every time I escalate a situation, whether I'm right or wrong, I always end up feeling like the D!ck. And whether or not any of us are attempting to be an ambassador of the sport, we're always representing ourselves and you never know when you'll come across someone again.