Players can purchase items and it just goes into a negative balance. There is nothing to stop them from buying as much as they want. I understand the idea of negative balances as a way to penalize killers or deaths, but there needs to be a way to stop other plugins from allowing the purchase of items and going further into the negative. As it stands this plugin-in is broken if players can purchase as much as they wish. Economics on the other hand allowes you to set the maximum negative balance a player can have.