Its not that nobody is moderating it, its that nobody is following correct ban procedure, and therefore there is not enough proof to reprimand anybody. If you or someone else brings a legitimate claim, with screenshots and console logs , or a demo, it will get dealt with.
Keep in mind, we don't have much in our arsenal. We cant go permaban someone that just rushed to voteban someone. That's not a fitting punishment. Along with that, only super admins can ban people that aren't in-game. Therefore, even if an admin were to moderate, it would take a super admin to administer punishments.