We have always given more power to users who have a high karma as they spend a lot of their time interacting with this site. A new user can quickly gain karma but sustaining it at a high level requires a lot of effort.
We recognise this fact and all users who have a karma value over 14.00 can now act as admins on the site. This means that they can temporarily disable users and remove stories. All admin level activities are sent to us for final validation but this should help alleviate the spam problem on the site.