My rule was parents=not safe, rest of world= not safe.
Home=not safe and away =not safe.
I can relate to that.
To me though, people=not safe; school, other's home=not safe; city, buses, world= caution, but nature, wilderness, animals, my home=safe.
So I do isolate, for various reasons, such as...social situations are incredibly triggering, most people remark how social I am, but I'm not, it's incredibly draining, and I'm on edge the whole time to 'perform.'
I naturally can only handle limited social contact w/o getting overwhelmed. People are alot of work. I prefer a very small group of friends or needy people in my life. Always have from earliest memories of life.
I have a tendency to "loose" myself when around other people, I really don't like that and it still feels out of control, so I keep people at a distance in order to keep a firm boundary. Prior my boundary was a solid-not like family, now w/o foo I seem to be more adrift in identity(?), just a hovering cloud of a person, loosely formed, I can adapt, but I still can't trust myself to behave how I want. I have a more 'solid' I AM in isolation which is rather rewarding(less internal fighting).
I can't see how cruelly people treat each other and kin, it just tears me up inside to see it, I can't save everyone.
I've also found that I tend to attract and gravitate towards abusive people, so until I work through those issues, isolate, isolate, isolate. I now know if someone 'reminds' me of a foo member, run away!
*when I mean isolate though, it just means I keep acquaintances only, and try to not get sucked in conversations with strangers. I live my life, just with a whole lot less 'friends'. Do my schtick, go home.