Alright, I'm just pulling this out of my ass, and I don't even know if it's possible, but here's the general idea:
1: You need 2 computers, hopefully a desktop, and a laptop.
2: Get a program that mirrors the mouse clicks, and the keyboard from your computer, to another computer that you connect the program to.
(There's programs like netbus that lets you type and move your mouse on the victim's computer, so I'm sure there's something that will fit our needs.
3: Set up two identical characters (on different accounts) on the same realm, only add (copy) to second character's name.
For example:
ch1: Bob
ch2: Bob (copy)
4: For the second computer, use another IP, whether that involves your IP changing every time you connect to your network, or having a neighbor let you use his for a bit.
5: Log on, with both accounts, and get them to stand side by side. Once you start moving with the main character, the copy should do the same thing. (assuming everything worked)
6: Go in a crowded area, some people may start asking you how you did that, so you can tell them anything you want.
How can this help me?
Well, it can help in several ways, ranging from getting them to download a key logger ( saying it's the program that will make a copy), to telling them that you can activate it by typing /DnD *bla bla bla*.
Of course, this is nowhere near finished (or started), and I am only brainstorming, but perhaps with your guys' help (and constructive criticism) we can make this work.