As in the title, an option to toggle personal space for certain people or groups like safety settings for avatars. There could be blanket settings for Users/Known/Trusted/Friends etc. plus individual toggles similar to the show/hide avatar options.

Idea came from a friend of mine really, who wants to get into VRChat but also really likes his personal space. One of the first things he asked me was "Is there a whitelist for personal space?" because he wanted to allow only the people he is comfortable with to be able to get into his space, but doesn't like the idea of it being completely on or completely off. I liked the idea and I wouldn't hate having it myself either honestly, so I'm throwing it out there.