If one of you guys want to be really despicable:
Go to a Best Buy store and buy ten $5 gift cards (pay with cash, have someone else make this purchase for you). Bring a phone with a camera if you have poor memory.
Take a picture of a BB employee's name tag for reference. Go to kinko's and have this name tag made (change the name to something else).
You will also need a pair of beige khakis and a royal blue polo shirt (royal blue, not navy blue OK?).
At night after the BB store has closed and people have started lining up, you show up with your khakis, blue polo shirt and name tag.
You might have to enlist another person to help you.
Go tell everyone in line that the store won't be getting any units due to an inventory issue. Post some sort of announcement at the entrance doors. Tell everyone to go home. Hand out the $5 gift cards to the first 10 people in the line.
Call your friend (the store general manager) and explain that you've put up the posting and handed out the gift cards. Apologize profusely.
Leave the premises in your car. Once everyone has left, your friend will call you to inform you. Then you can go line up and bring your other friends. It might work better if you and the "general manager" don't go line up. Have someone call someone else to tell them that there's no line at the store. This way, it'll be hard to trace it back to you if the store decides to view the security tapes. Oh and pay with cash and have some people, especially the first guy in line wear gloves (it'll be cold in the morning, no one will question).
Remember to change out of your "uniform."
Btw, don't do this. It was just a mental exercise.