^ I agree. Quite often, hidden camera so-called "exposes" are nothing more than information we all knew anyway, gathered and presented in a manner to sensationalize an otherwise boring story. Very, very, very rarely is anything new brought to light, and even then, it would have been easy via actual honest journalism (research and actually talking to people) to come to the same facts.
IMHO, when I see the term "hidden camera" in a news line, I can safely assume the reporter was more interested in glorifying their own job than revealing any great truth.
FWIW, I take issue with the claim that hidden cameras have ever been out of vogue. It's been a favorite tool of news departments anytime they need hype for ratings.