Basically, either a 5 star type rating system, or a karma system that would be displayed in game and out. Like, say if someone griefs and destroys your creations in a building game, or someone scams you. You could submit a negative review on someone so that others know to avoid them. If users get within a certain frame of negative reviews, they'll have certain privileges revoked. Another thing could be that owners of a game could choose not to let people with an average of 1 or 2 stars. Also if they get too negative, it will alert moderators to take a look at their history.
tl;dr: A karma system. |