TFL:)R version: Thanks for letting me vent. I don't feel selfish for setting boundaries with normal people. I just want to be left alone by my family and I have more resentment than a dozen years of therapy have yet to get rid of.

Super Duper Novel Version:
Thanks, GeekyGirl. I learned some wonderful lessons from her the 17 years I had her in my life, just as I learned so much from her dear departed "sister" in caring for her during her terminal illness. They're so much more lovable than people... .
When the one sister that I will talk on the phone with started talking about bizarro stuff that I know is going to end badly for her, I put on the broken record of "OK... . how about that... . huh... . yep... . OK". And when she was catastrophizing I said things like, "I know this is really scary for you, but you are not going to die, and there is no point in jumping the gun and wasting energy on a worst-case scenario that hasn't happened yet. Please focus on taking care of yourself now and we'll deal with whatever comes later, later." I guess in hindsight there wasn't much point in saying that, but I meant it to be supportive.
I know my mom's a big girl and can make her own decisions now that I'm grown up.

As the name suggests, I'm "NotTheMama" anymore and she doesn't need me to try to run the show, no matter how much I was put into that role when I was a kid. I actually haven't tried to tell her for maybe more than a year that her life would be easier if she would let her children experience the consequences of their failures and poor choices. It was more an observation, like, "yeah this is still going on" just like I observed what was going on with "text-only" sister playing her phone call/voice mail game on Christmas Day.
Although... . I guess I am
angry about all the caretaking she is doing for my sisters,
many years into their adulthood, when she couldn't even be bothered to do basic things for me like keep me safe from abuse. Maybe she's trying to make up for those years or something with my sisters. I guess it's just too late for me. But even if it wasn't, I don't want anything from her, except maybe if I'm to be brutally honest, for her to be punished some more. But that's just a feeling, and I can just acknowledge that feeling and pass it by.
He

NO I don't feel selfish or uncaring. But I would if I allowed them to make me feel that way. I don't want to subject myself to visits peppered by frequent bickering, shouting matches, name calling and general immature behavior and I'm the weird one for avoiding attempts at contact. I'm the one who is demanded to explain "what did I ever do to you?" as if I would ever waste my breath on that topic. Why can't they just see "I don't like you people, why would I want to be around you?"
We have nothing to do with my uBPDMIL and ignore calls/voicemails from her. We hadn't heard from her in ages and thought she'd finally got the picture, but no, yesterday she called again with some weirdo message about something that is completely irrelevant to our lives. But in the past few years she has become unable to hold a job or function really, so I'm not surprised that there will be occasional "What the heck?" moments with her. We seem to weather them fine.
My father lives about a 20 hour drive away, and in the last ~20 years, I have seen him exactly one time. I loathe the idea of him. He tracked my employer down 15 years ago and made me cry on the phone in a very public place at work. Now nobody is permitted to give my contact information to anybody without my express prior permission, so that I do not have to have contact with him. Some (nutty) people might say, "Well, it's been such a long time since he did anything hurtful, you should give him another chance." Yeah, it's been that long because I do not allow him in to my world AT ALL. I don't tell my sister not to talk to me about him, but I don't exactly engage her further on the topic if she does bring him up. He couldn't provide what I needed when I needed things from him, and now that I don't need anything from him, if there is the risk of harm from interacting with him and no real benefit to me, why would I have him in my life?
I think perhaps the fact that my mother and sisters all live within a few miles of me, I have yet to officially reach that place with them, even though that's where we are de facto. I only see them a few times a year; about as often as I see family members that live several hours away.
I think the fact that we have the misfortune to have so many toxic people in our FOO has left me in a "Through the Looking Glass" sort of place. It's sort of like if you're always losing your job because your horrible boss makes up lies about you and has it in for you at job after job, eventually people are going to go "hmmm... . maybe it's not so much the boss with the problem here?" I have moments of uncertainty when I say "If I always have to cut ties with these unhinged family members, maybe it's really
I'm the one that's crazy." Well, I think the fact that I've spent so many years in therapy and made so much progress on myself and am asking that question confirms the fact that I am not. Plus, mental illness runs in the family, and I'm just lucky to have emerged with only the minor problems that I have.
Anyway, I really like your idea about "how about we talk after 5 pm?" for normal people except what I need to say to my family is "How about never? Is never good for you?" My well is dry. I am exhausted from hearing about their problems and their bottomless pit of need. I haven't needed help from any of them since 1999, and I would appreciate it if they would extend the same courtesy to me. Hmm. I guess that's not true. I do have one thing I want from them. I want them to leave me alone.
Oh my god, what a novel! Thanks for letting me vent!