The devs themselves have stated that they will never include people with the base game because it would push the rating into the red end of the gore-splatter zone. They are also unlikely to approve any mod for the repository that adds people to the game in order to manage the game's image. I think there may be a mod that places the crash test dummy made by @synsol into some of the official cars. I do know that it is an option on the Olds Fullsize mod, provided that you read and follow all installation instructions correctly.
I talked with nadeox about the same subject, and he said people were OK, but they couldn't go on the repo.
And thus why unofficial mods from sketchy sites will always be a thing for BNG. Same reason you have to get real-world cars from sketchy sites (if you can't find them buried in the forums somewhere). FWIW, if you poke around, you can find STiG models and Crash Test Dummies. For that matter, many games have people in them and the people dodge oncoming traffic as to avoid the whole blood/gore issue. From a technical standpoint, though, I can see where having people running and dodging could be a huge resource hog and make the game lag.
What about the stig driver? https://www.beamng.com/threads/ragdoll-driver-the-stig.11073/ Update: Don't tell me it doesn't work. 100% works on my end.