I've investigated Nicole the Fediverse Chick's Friendica instance more up close (one of her instances? does she always spam the same instance?). There's an update from 2 days ago, showing "my dad's office". I think @cmdr_nova may be onto something here: The photo of the dad's office is a video stil. This feels both too deliberate to be just automated, and too strange to be organic. Asshole ex impersonating her? Scam network mining content from leaked videos?
In any case it creates a dilemma: I DM'ed her, but there's no way to know whether I'm DM'ing an evil doxxing guy. Assuming the publicised work address is real, this is probably the best way to warn the actual Nicole, if she exists. I live in another continent so I can't just walk in there, but maybe I can contact the company—though I have to choose my words carefully to not sound like a scam myself, and also not bring problems to (potentially existing) Nicole at her job…