I'm saying that if someone is willing to share all their secrets on an open forum, then they aren't secrets anymore.......they are public knowledge and fair game. Now if you know someone that takes you to his spot and shares that with you, then yes, you absolutely had better keep the trap shut. I don't really consider that ethics either, more like "an ass-beating prevention methodology".
I made that mistake several years ago. I took a buddy fly fishing to a spot that my dad and I had been fishing since I learned to walk. He blabbed, and now I haven't been back there in over 10 years because everybody and their brother has been in there since.
Just keep the trap shut and all is fine........no need for ethics there. My wife doesn't even know where I hunt. Is that unethical?