That's cute. And good for them! Jimmy Kimmel has done this with social media, too - getting people to believe, tweet and discuss things that are total BS.
I love that they used dark chocolate, lol. I can't tell you how many times people IRL have suggested that I should eat it because it's good for you and helps with weight loss. NOT regular chocolate, they always point out, lol, DARK chocolate.
I don't think there is any harm in *most* weight loss fads. Dangerous drugs, obviously, are to be discouraged, but if someone wants to eat chocolate, cut fat or whatever, there's no problem.
It's fun to kick new ideas around, sometimes, even if you suspect it's total BS.
Like the above poster said, some things help you because you like them and that works, too.
Still, when I pass the Ghirardelli store, I don't go in for the freebie pice of chocolate. I'll skip that help.