Sharing is a great tradition of advanced fishermen. They share locations all the time and usually in person or through a private message. It is a shame that these forums are being "watched" by non site registered people who want an easy catch. They troll for posts with specific locations. They cannot or will not do their own homework to find the crappie and want the easiest fish landing scenarios they can find.
It seems that most times posts are unintentionally giving enough information to put these lurkers on your spots if you are not careful. Giving the lake name or posting in the "state forums" is given as it helps others know which part of the state is biting. But when you put in the post "I was at this tree at this end of the lake" that is usually enough info to put people on your spot.
Just water color and temp, weather, jig color and depth fishing is all the info you need to give out. If I post and someone pm's me for more info I usually share with them because they usually share back. This is the best way I know of to not give out and dry up your favorite spot.
I have seen first hand what happens when someone gives a specific location. I remember this bridge that was producing limits last fall and when the word got out people were pissed because the boats were piled up at the bridge and people couldn't even drive their boats through at times. You could literally walk from boat to boat as they tied off under that bridge. Well in less than 1 month that bridge and that bayou have been fished out it seems. It is hard to find crappie there now. I know they will return but the damage was done.