The many uses of forged boarding passes

I don't think airlines allow free transfer of flight tickets to our friends. Here is a workaround:

For starters, the airlines don't want you forging boarding passes, since they don't make tickets transferable, and they want to make sure the person buying the ticket is actually the person flying. If your friend wanted to fly on your ticket, you could check yourself in, give your friend your real boarding pass AND a fake one in his name. He would use the forged pass at security and the real pass (with your name) at the gate.

Please expect unpleasant results when using the above strategy on international flights. Their procedures are different. Should be ok for domestic ones though. YMMV.