None of the times I've been sexually harassed in Hollywood were covered by an NDA, but I have had one used against me once.
(What's an NDA? NDA stands for Non Disclosure Agreement, which is a legal document that bars you from talking about your work or employer. They're common in Hollywood, often built right into writing or employment contracts. It's plausible that studios might actually need them to prevent writers / employees from publicly discussing their secret intellectual property. However, they're most often used to muzzle and silence the less powerful person in the situation, especially when it comes to sexual harassment and abuse. It's pretty convenient for them to start the professional relationship in a deeply abusive town by saying "Before you start work, remember you are legally barred from talking about any of this!)
It was my trolls who tried to weaponize an NDA against me. This was only a few years ago but even back then it was less common for women to get hired to write the kind of stuff I was doing. And online film dudes were furious about it. There was also less consequences (really no consequences) for harassing women online. In fact, it was considered the right thing to do because mouthy women needed to be brought back in line. And like the producer I was dating at the time said "what are YOU doing to bring this on?" (Don't worry, he never did anything for me in any way. He did show me a piece of IP once to maybe adapt that I passed on because I thought it was derivative. Women have to always caveat everything they say about their lives / personal relationships / existence to reassure everyone they're not getting something they shouldn't be, aka stepping out of line. We are acculturated to constantly reassure the world we are not attempting to get anything more than we deserve.)
So film dudes online were furious about my existence. Furious that I was political (leftist) and opinionated. Using the Gamergate playbook, they were creating sockpuppet accounts to troll me, inventing imaginary transgressions and misinterpreting literally everything I said in an effort to get me somehow. To stop me.
It got really bad. I considered filing restraining orders on some of them.
And one of the worst things is these creeps successfully started and spread a rumor that I was violating my NDA and was about to be fired over it.
"How far could online film dudes spread a rumor?" you may ask.
It spread so far that I heard from people in real life that it was being repeated by important people in the industry, even a producer attached to my project.
And this was something one hundred percent started and spread online, in a context of other malicious rumors and gotchas. I had been Gamergate'd, though at the time, we didn't understand how powerful and destructive this kind of harassment could be.
I find it fascinating looking back that these dweebs' tool of choice to threaten me with was the NDA. These people were low-level, mostly jobless and powerless (I knew who some of them were) but they managed to weaponize online connections to more powerful writers and Hollywood people in order to spread the harassment. All under the pretense that they were doing a good thing, they were in the right, by shutting up a woman writer like me who didn't obey group-think.
It's amazing to me that the lowest level people adopted the imaginary threat of the NDA ... the same legal tool the most powerful people in Hollywood use to shut up their victims.
NDA's are tools of oppression. Ways to legally cover up abuse.
And threatening or rumoring that someone's breaking their NDA is simply trolls using the powerful's legal weapon without ever even having to call a lawyer.