I don't see a problem with providing a report with general information about a popular river system. For example, stating that you fished the vedder or stave and did well on coho is fine. Providing GPS coordinates to the exact location or a sensitive/small river system will result in upsetting your fellow anglers, and could ruin the run for yourself - unless you're talking about a very popular spot like the KWB...
Then I'd know that you really don't know what you're talking about...
Seriously, part of fishing is discovering those "hot spots" for yourself and it does take effort. The result can be very high quality fishing, and it can be very rewarding. It can be the difference between a couple of hookups to 25 - 30+ coho hookups per trip. If you discovered a productive run with minimal pressure and lots of coho and it took you several trips to discover this run, would you want to broadcast it out? If you say "yes", then I'd say you've just ruined the spot for yourself and any other anglers who took the effort to find the spot for themselves. The number of hours you and others spent finding that spot just vaporized. Also keep in mind that if you post the results in the "general discussion" part of this forum, then ANYONE can access the information.
Just my 50 cents worth...