Theft from the company is the central tenet, whether you are an insider, have a fiduciary responsibility, or an outsider who comes across data from inside the company.
Material nonpublic information that isn't taken from the company is fair game, thus all the quant funds that collect detailed market intelligence and trade on it (or the posted example, a passenger on the plane who knew the news ahead of the public). It doesnt matter one whit whether the information was material or public, it matters only that it wasn't taken from Boeing
EDIT: I was involved in the early days of a company that sold data to quant funds, and spent many hours with lawyers on exactly this question