Yes the forum is a great place, but if you shelter yourself within the forum, you will loose touch with the market, and if people are out there misrepresenting and altering notes, it is truly going to hurt the hobby. As established collectors it is our responsibility to help monitor and police the action of the hobby.
A new collector buys these notes, and then tries to sell or trade it to an experienced collector, then finds out they have been had by the seller, and it is too late, the damage has been done and you now have a pissed off collector, and a fraud artist who is laughing their way to the bank.