How to delete a device from the AT&T UVerse Network Interface?

I obtained a password using a method I shouldn't have used, and connected to the internet with my iPhone. Here's where the problem is- The device is labelled with MY FIRST NAME. I'm paranoid now. I have full access to the network interface where it shows my name. The people do not know me, but I'm still very scared. How can I change this name to something random and unrecognizeable or delete it? It seems to be the standard At&T UVerse interface
Serious answers will be appreciated and a correct solution will get +10

Added (1). Thanks Spence! It worked.

Unforchantly You can't I've tried. But you can change the name of your device reconnect and then unconnected and Change the name back. And they will never know.