In 2015 I met a radar engineer that had gotten out of the navy. I was working on some crappy twitch knockoff that never launched. He had a recruiter friend that wanted to find an engineer to help with training AI/ML models to predetermine terror threats from social media posts. They had already won some grants and stuff but they couldn't find anyone. I have no interest in building that but I was curious so I took the call and they were interesting people but I was like "what are you training this on and how do you prove anything?" and at that point the conversation was basically over.
They were for sure not the only people working on that. Even if they have a straight pipe from all the major providers or whatever this is just a BS tool of control like polygraphs. I was once the CTO for a legal deposition ipad app. One of the reasons I left was because the vendor they decided to switch to for transcription of video was offering this "micro-tremor analysis" that would detect probability that people were lying. To put in a legal deposition app. They did their magic with mono 28k audio files stripped from our HD videos. The attorneys and clients were SO excited. They didn't care if it was BS.
After I left it limped along for a while, but I think my leaving killed that idea and then later that project and I don't regret it.