Simple question:

I bought the 3-day like everyone else, only to see Rage & some Sat. acts. Don't care for the Friday ticket and want to sell it for face value. However, it being emailed to me and being in PDF format, would someone be able to counterfeit any of the other days, using my order number, or screw around with TM and get the tickets re-issued? I know the barcodes are different, I just don't want to be SOL after helping people out and selling them face value. Any info helps folks.