Tailing logs
From Encyclopedia Dramatica
Something that uber nerds do when they run super hot websites on the internets. Tailing logs on a server allows the administrator to watch traffic coming in to the machine in real time. This means having the ability to see who is accessing which exact data at that very moment. This comes from the *nix command "tail" which displays the last lines written to a file. A good site administrator can watch as a user goes from page to page of a site as the user is actually doing it. A bad site administrator cannot do this.
All users on websites should expect the reasonable possibility that they are being watched at that moment. For instance, I just saw you come to this page and see that you are still reading it.
