TBH all that GM's can do is read here, notice that people farm in this way or they exploit in that way and then add it to a "to do list" for the devs by which time the exploit or farming technique will be milked anyway.
Plus a lot of the posts here aren't exploits anyway, they're legitimate money makers and were built into the game code to function exactly as they do. Check out the Golden Pearls thread as an example.
Blizz are FAR more likely to go after forums and/or sites who host 3rd party software specifically built to hack the game, teleport, float etc as they're in complete breach of the UAP's.