What they're saying is these folks don't trust the privacy of their hardware, they use a dud cable to block the microphone from listening.
I think what they're getting at is people close to the situation (not sure why Ye is in the privacy discussion, but Zuck certainly is) don't trust the controls in place.
Are you talking about Kanye West ? also can you expand what this means? "plugs the laptop mic with a dud cable"