Friending people on facebook is like adding them to a contacts list for me. I may be “friends” with a ton of people but I only subscribe to or follow people I genuinely am interested in hearing from on a regular basis.
I have pretty advanced security settings on who can see what and I always add people I don’t really know (or am not sure about) into a buffer group where they have limited access to my info and posts. After a period of time I may move them into a less “secure” group as the relationship grows.
Hateful or ignorant rantings make me unsubscribe pretty fast. I rarely defriend.