You've got a point sir but trust is different to merits for merit is a requirement to rank up while trust is used in trading(correct me if I'm wrong). So some maybe able to use this to earn and abuse but the good thing is it is limited. If earning this merits would be hard enough then i think we would likely able to see people wanting to buy merits or people trading merits to each other. Though they will face the consequences of their action too once they get caught. I believe this issue about abusing merits will be closed soon.