I highly doubt it's witness protection. For one thing that police document was filed in 2014 long after she had started using the name Zoe Quinn. I think she's legally changed it since but I can't remember off the top of my head.
Look, there's a real issue when discussing Chelsea which has been bought up a lot ever since the Zoe Post first dropped. A lot of people recognise her behaviour as being airily akin to well, a type of mental disorder. Now I would not be so bold to spectulate on such on a claim, that would be rude, armchair psycho-analysing someone I don't know. So I'll just say what everyone else has been saying since day 1. It's cluster B personality disorder, most likely Borderline. Her behaviour as documented in that post and pretty much everything she's done since checks every single box.
But you see the problem with that is that shortly after Eron posted his spergy break-up letter to the world ,and 4chan discovered it and started fucking with her, Zoe responded with a rather famous post called, "I Will Not Negotiate With Terrorists." In it she detailed how all of the shit that had been flung at her by the internet was all because she was a woman in male-dominated space (I think that's the exact wording she used too) and that the entire thing was misogynistic.
Now to get this out of the way, trolls tend to personalise their insults to your specific personality. If someone's, say, a very, vocal and public feminist who even un-ironically refers to themselves as an SJW then the sort of insults they'd hurl at you would probably be suited for that person and would thus would likely be incredibly misogynistic and sexist. But that's missing the point too, people were angry about Chelsea for a variety of different reasons (including some not in the Zoe post - several other people posted lengthy call-outs about her behaviour in Eron's wake.) Some of those reasons, well one of those reasons, turned out to be partially bullshit (the sex for reviews claim but that's another topic as to what did and didn't happen and why it's still repeated ad nauseam by idiots to this day) but a lot of them were quite true.
Chelsea's response however was believed by 'woke' twitter (and then by feminist blogs, and then by mainstream news sources citing those blogs) although it wasn't called woke twitter back then people were just calling them SJWs and feminists. And when you invoke feminism there's an entire language that has been developed over the years on the internet, in order to seemingly protect women from sexist mistreatment. For instance: sea-lioning, Bad Faith (which I swear just sounds like the name of 90s nu-metal band) and being an armchair psychologist.
The irony with Chelsea is of course that she's able to essentially hide her bad behaviour by invoking this stuff. She basically managed to turn an entire language used to, in theory, protect women from trolls on the internet and turn on its head, revealing to a bunch of dumb-ass 4channers how easy that language is to manipulate and how it can be used to defend someone who is really undeserving of such treatment.
But the real irony is that anyone trying to tell someone what Quinn's really like, at least on the internet; tries to tell someone that Quinn might have BPD they're labelled as an armchair psychologist. And they're right. I don't know Zoe Quinn, I've never met her. It's true I'm analysing all this based on a person I've never met. Unfortunately I think it explains everything about her behaviour. There is no other conceivable explanation.
Seriously, look up Borderline Personality Disorder and the symptoms, I'm no expert but it explains everything Chelsea's ever done and will continue doing until she properly seeks professional help.
But I am totally being an armchair psychologist right now.