Yes, educating the forgers has been a concern all along. This is why it's important for collectors to get input from others to confirm an autograph is highly likely real before they buy. That's the most important uses of sites like ours.
Indeed, this site provides an invaluable resource for collectors at all levels. Free opinions from a wide range of folks with varied knowledge and no dog in the fight, and the ability to discuss our observations. Win-win.