A few years ago, there was a big hubbub over someone finding am M72 in the ditch beside the only highway north from Victoria. The speculation was it was to be used in a gang related extermination but either was a dud or they chickened out and left it by the side of the road. A few unofficial reports circulated about having it waved about and shouldered until someone that was familiar with the weapon suggested that it still had the round in the tube. That ended the playing around. I don't recall all the rest of it but it apparently went 'missing' years before and remained unaccounted for until this incident.
http://www.freerepublic.com/focus/f-news/2617577/posts