My vote lies with Locked Inside and Clans/Factions. Simply put, why aren't hackers just banned and such as well as if there is a killer how do the moderators or system administrators not track them down. They literally have scanned the brain and sometimes the body of every player. It wouldn't be hard to see which character ends another character and know instantly who they are in real life. It would take a lot of simply having some bull like 'they have ways around it' to actually hide who they are and how they are killing people.