If you get scammed, you get scammed...end of story. This kind of stuff happens in the real world too...just because this is a game does not mean that real life does not transpose into it. No one ever follows the rules exactly cause we are not perfect and never will be.
If you feel you are being scammed, then get out! Use your brain...it comes equipped with something called common sense. But it seems that most of the graal players do not know how to put it to good use...sad it is
