I am never surprised by what I see on ebay.
In a way this is funny, and in a way it is not! I wonder how the auction ended - if the winner paid and got his merchandise promptly, in good condition, etc., or not!
Did you see that seller's feedback?
First thing that came to my mind was "scam". Just an opportune and interesting way to get bids on the item. I don't believe it. If they think their son did do something illegal, why post it on the internet for everyone to see and possibly risk being investigated for criminal activity? Even trying to teach your son a lesson is not worth you possibly having to go to jail for something like this.