Just the facts, ma'am... um, sir
Axes can be ground with sheer force of will, but a stone is better to put a razor edge on them.
Call the person who does it what you will -- and I agree that the epithet depends on whether or not one benefits from the secrets being uncovered -- but if it's fact-based, it's muckraking in my book, especially if it leads to a cessation of the revealed practices.
I'm certain you know where the phrase "how the sausage is made" comes from.