My two cents. Rather than proving or disproving that event happening, I think about how's that supposed to make me join a religious organization? How is that story or event supposed to make me want to worship God? By fear instead of by choice? Will that be a legitimate, genuine devotion if I have to be scared the crap out of in order to pay attention to "loving Jehovah"?
Then there's this, if it happened and if it happened for the purpose the bible says, it was a very crappy job from perfectly-knows-everything-there's-to-know-in-the-universe "jehovah". Today the world is flooded (no pun intended) with the kind of people who were supposed to be eliminated from the planet by that flood. In other words, Noah and God lost (we won). So God's catastrophic tactics of destruction and extreme fear and life threats to make you do as he says (a) doesn't go well with legitimately worshiping him, but most importantly (b) DOESN'T WORK AT ALL. Just look at how the world is now, compared to what that story claims it is.