Im a nobody and I always put up the fake background, even if its absolutely fake as hell. If I'm in the office theres potentially private information up on the whiteboards behind me. If I'm at home thats my private space and thats my business.
Greenscreening yourself is like one of the least weird thing about Zuck.
"So in order to solve the dependeny issue, I think we should contact the...OMG those readings suggest an artificial quantum singularity, it must be a cloaked D'deridex-class Romulan warbird!! Red alert!"