Gosh, I'm reeling from the weirdness of the parents in the last dozen posts!

Going to limit myself to a few comments, and they might come across as too crisp. I'm sorry, they're not meant to be.
I've 'trained' my mother to respect my front & back doors over the past year. When she arrived without notice - knocking, peering through the letterbox & trying to force the back door open (it's broken), I opened and stood on the doorstep, saying "I asked you to ring before you visit". She'd say she was passing anyway - she lives nearby - and I said that wasn't the point. She'd ask if she could come in, I'd say No. She'd ask "Why?" and I'd say "Because I need you to respect my personal space." Then I'd wish her a nice day, and tell her I'd love her to visit when she rang to arrange it.
I couldn't have done this as clearly if my father were still alive, because he would have taken his anger out on her. He did respect my NC in my early twenties, so I think I would have gone that route again.
She still tries it on - and has aften phoned from the end of my street, saying "I'm ringing to let you know!" (hahaha) I know mummiehunnie has carried through a similar exercise with her mother, and piranhamorgana has achieved amazing breakthroughs wrt her spectacular parents.
I am letting my nephews know I consider their parents abusive, pm, and am borrowing from you in allowing myself to be unafraid of the family wrath that will fall on me for doing so.
Snowy, it sounds like your brother could do with a visit to the Stately Home! This may sound ridiculous (but isn't) - how about you suggest getting some PIR alarms for his doors & garden, and telling him why?
I understand your aversion to labelling, Honolulu. Thank you for sharing your story. It looks as though the co-patients' attempts to label you triggered the feelings you had about your parents' insistence that you were 'mad'. Would it help you to consider that it's a characteristic of BPD to seek to blend with the personalities of those around them? That is: their labelling was not to do with you or what they saw in you - it was an attempt to make themselves feel more comfortable, by inventing shared qualities between you.
This sort of thing happened quite often in rehab. It was very instructive!
I feel privileged to 'know' the members of these threads. Thank you for starting the new one, mh :)