First, you've completely ruined your entire story. The second that sign would have been put up, they would have been shutdown. There is no way in hell a store would have gotten away with advertising that kind of stuff without gaining legal attention.
And if you were running Mario World on a PS2 as a demo, the store would have been shutdown because like I just said, there's no way something like that would have not gained legal attention. And worst of all, you claim to have told them that it was hacked. There's nothing even remotely believable about your story.
And what would you gain? IDK. I guess 5 minutes of fame? I mean, your post got my attention, even if it was to call it bullshit.