I've been N/C with my parents and maternal side for 23 years.
Most didn't really give a shit about it and had treated me with utter ignorance for years anyway so I highly doubt they noticed.
My mother though, and I use that term loosely as she doesn't deserve the name, god she was a nightmare.
She would ring up and make complaints to my landlord, to the police, she would go to the GP and say she had concerns for my MH, she went so far as to try and get him to section me because I wouldn't tow the line.
I actually left my whole area and moved across the country because when I had DD, and this was 10 years on, she started calling up social services weekly. It was awful. At one point I was convinced I would lose my child as one social worker got quite nasty and said that there was no smoke without fire. She said would be putting forward a case for an emergency order whereby I would need to be watched in a Mum and baby unit with DD. Luckily, DH and his family stepped in, a huge legal letter sent and they left us alone.
Anyway, I was late to social media, but when I first joined Facebook, I saw that my high school was having a reunion for my year group, so I went for the evening. The amount of people who were shocked to see me was ridiculous, my mother had told anyone who she saw in town that I had passed away due to drug abuse and she was heartbroken as she tried so hard to "save me" and she had even remortgaged her house trying to sort me out.
This was all utter rubbish, in fact she remortgaged to try and force the social services to hand her our DD! And of course, solicitors will take anyone's money if they're stupid enough to spend it.
I'm pleased to say that I've heard nothing in about 7 years now, I had actually thought she may have passed away. Sadly, she has now moved on to being nasty about, and to, my Sister's ex-husband and helping to try and stop him having access to their children, despite her being the one who had multiple affairs.
She's utterly nuts, if I didn't hate her so much for how she behaved when I was a kid and the long-term affect this had on me, I would feel sorry for her as clearly she has no life and can't help but try and ruin others.