Original source: <a href="http://www.tomscott.com/mob/" rel="nofollow">http://www.tomscott.com/mob/</a>. From the guidelines: "Please submit the original source". That's not quite the same as embedding something in your own blog and then submitting your own blog.
I don't care for this, it reminds me of slapping an "e-" prefix on something just to indicate that it's now somehow "internet ready".<p>More to the point, people acting like idiots is nothing new, but I think we'd all still be shocked if this actually happened, just like we'd be shocked if any kind of gathering resulted in a riot and 23 people dead.
I don't get the point of this.<p>Yes, it's possible. But so what? A person in the early 20th century could have constructed a similar boogeyman scenario involving those new-fangled flying contraptions: watch out! Someone can take a plane across the country to kill you in mere hours! Yea, and?
More than anything, this video demonstrates the potential power of social media to people who don't understand it's usefulness. It even helped me "get" twitter.