You may have seen this ad: A frenetic, wild-haired concert pianist says he can make any newbie a virtuoso in months. Just take his online course for $3,000.

Too good to be true? Redditors thought so. Posts dating back years cried scam. Some went further and claimed his virtual piano academy is a cover to recruit Scientologists.

In Part 1 of “The Music Man,” Endless Thread investigates.