You can be as secretive as you want in your fishing report posts. I used to work at a very popular tackle shop. We and and all the other shops send hundreds of guys to all the rivers. Shop staff have be known to draw very detailed maps with an X to mark the proverbial spot to stand on. There's a lot of resources out there to find out where to fish. Social media is a prime place to start. Parked cars on the side of the road are a dead giveaway. You can hang out in a tackle shop and eavesdrop or get another customer to loosen his lips. Everyone has a success fishing story that they want to share,its our ego,its human nature.