I'd love a Stinger, but you think if I wait a week they'd be on special?Today special:
Sending e-mail to the Feds is your call, but I think the Feds have better things to worry about than whether or not little Johnny is drinking beer (or *gasp* hard liquor!)
I'd forward it to the proper authorities.
I would not take it seriously for one minute but there's no way I'd simply delete it. Could be entrapment to nail people for not doing their patriotic duty. Used to be such tactics were illegal but who knows now? Given the Patriot Act, the wording of this note, and the voracity of our legal leeches I doubt you'd even get a trial. CYA.