As a relatively new 'fishing report contributor', my opinion may not be worth much to those who have 100+ under their belt. However, I may be wrong about that, especially because I suspect I am less than half the average age of this forum = part of the future of fishing.
First, I believe if there is anything you know and do not want others to act on or copy, never post it on any public medium - electronic, paper or frequency.
Secondly, I think the heavy fishing pressure of the springtime will inherently make fishermen edgy, especially bass fisherman. That for one is why I think this forum is more enjoyable in the winter as the folks who fish in December and January really like to fish. I am one of those and never have issues with sharing water in January.
IN regards to finding others who have moved in on your 'territory': I am a little surprised about this. As example, I have a place I have found near the Riverpark that looks good on the sonar and from a fisherman's view. I have hit it hard for years as it just looks promising. And, I have never had great luck there. But, I see pictures on this forum every month of folks holding really nice smallies in that exact spot. No one showed me the spot. Others did reinforce my interest in it. And yet I would show it to people I take on the water. This pattern will eventually add pressure to that area. To me that is part of living in a wonderful fishing city with a thriving fishing population.
That said, when I show someone my favorite hole and how I fish it, I hope that they return to the hole and pull out a lunker. I believe good deeds will be repaid in full and most of us fisherman can use a little good fortune. ON the other hand, if I show a friend one of my holes and they in turn are rude and inconsiderate to me on the river, I would never hold this forum responsible. I would simply stop sharing my knowledge with that person.
I'm almost done.
Lastly, I'd like to thank everyone who has made this site what it is. I know relatively few of you but really enjoy you for the entertainment and the knowledge shared. I believe the premise for which this site was designed is to be applauded. Like most good things, people have to fight for them. I think its time we relax, enjoy the spring fishing, and fight to continue what was begun on this site just a years ago. I appreciate the time you 'contributors' took to read my opinion. I hope that it is useful in guiding this forum.