Sorry this happened to you. Unfortunately when a rare reward gets introduced into a casual competition, people find ways to exploit if they feel powerless to obtaining it through the intended method. I hope they find a way to re-scope the quest and reward structure to deter this kind of behavior. I'm glad you posted it. I think sometimes these tactics go through word of mouth before they get publicly recognized. Yeah, many will catch wind of this and repeat this bad behavior. The silver lining is that it will provide development data to support your argument in the long run.