Well, since the kid's "Nuclear Reactor" was confirmed by news reports, EPA, DOE, NRC, and state DNR activity, and police reports, the "Radio-Active Boy Scout" isn't much of a "myth" for them to bust.
However, they've done other "myths" that have been media-confirmed, like the jet engine flipping a car. So I think there's two possible explanations the post got pulled:
1. This is such a juicy myth compared to other obscure stuff they've done, there's a good possibility there's a future show planned on it and they don't want spoilers out there.
2. The safety and regulatory issues surrounding radioactive materials (especialy post-9/11) are so great that there's no way they can test the myth within the confines of their show's budget & resourcest. Either that, or in the interests of liability, they'd skip naming so many elements, and common commcercial sources of radioactivity that the "boy scout" exploited, the tests would be boring and meaningless.
IMO, it's the 2nd option. The production crew and their researchers are probably well aware of the "Radioactive Boy Scout", but the tests are so problamatic there's no concievable way they could try it. Any threads on the "RBS" get qashed to prevent the appearance of a well known urban-legend they're not able to address.
I did read the book that's listed above on Amazon BTW, don't waste the money. The short article on the Internet is just as good. The author has to flesh the book out with lots of off-topic stuff about the nuclear power industry to make it full book length.
The gist of the story that you find online about the kid is accurate enough.
BTW, the RBS did have a geiger counter, and what it told him scared the bejezus out of him. He dispersed the contents of his reactor around town to get the pieces away from one another when it was getting "too dangerous". (by his rather high standards for what constituted "dangerous")
He didn't really build a "reactor" it was never a self-sustaining reaction, nor did it produce useable energy, but he did get several isotope transmutations going, and it was producing lots of high order decay products.
He found a bottle of Radium paint in an antique store for refreshing a GITD clock face, He used the Americinium from smoke detectors, commercialy availible Uranium ore samples, tritium from night sights, Thorium Oxide from lantern mantles, and he also used a whole bunch of non-radioactive "regular" elements that were useful in the reactions, or could be made into radioactive isotopes by exposure to radiation from the naturally radioactive ones.
So he never got a "reactor" going in the sense of energy production, but he certainly reached his goal of making ever more radiation.
The Feds packed away his garden shed, all his equipment, and lots of topsoil from his parent's yard, and took it to a hazmat dump.
