Ex keeping tabs

[OverlyFragrant]

I was with ex for many years, from teenage years to early 30s. I didn't realise how controlling and coercive he was until I was out.
Once broken up many revelations came out that a) my gut instict, that he called me crazy for, was bang on the money; b) made me very very ill, I lost most of my hair and take life long medication thanks to him, and c) permanently damaged my relationship with some of my own family members who protected him and allowed him to gaslight me.

We've been apart for nearly 5 years, my life is immeasurably better without him and I am thriving.

In the aftermath of the breakup I locked down my social media and made sure only those who I trusted and shown themselves to be trustworthy had access to my socials. A few months ago I found out that the ex had been visiting one of my sisters Facebook pages, and had found out about my Dad's passing. Then today my brother (a bona-fide influencer posting nothing personal about me) told me he's noticed my ex essentially viewing every single one of his stories.
DB has since blocked my ex but it worries me a bit.

So as to not dripfeed, I found out about ex viewing sister's FB page when I ran into him in town, first time I'd seen him in 4.5 years and we had a cordial conversation. I told him my Dad had passed 2 years ago and he replied that he knew, he saw a post my sister had put up.

Ex was never violent, and I don't have any fear.
But this isn't normal is it.

Any advice apart from the obvious asking my family to block him everywhere and tighten their privacy.

I should add there's no children involved, no finances shared etc.

It was a case of me telling him its over and him removing me from his netflix account. End of.

Why don't you ask your sister to block him - it's always good to keep an private anyway. I would say it happens alot, people sneak peek on their ex's etc. But the level of fear you have is not normal - but totally understand why. Have you ever had therapy to process the impact on your health and mental health? ,I would
start there dont live in fear

I'm not in any fear, and I'm not needing therapy thanks.

Is he not just friends with her on Facebook and saw the post because he is friends with a friend? It doesn’t sound like he’s keeping tabs to me.

No, they are not friends.
She blocked his actual account under his name during the breakup.
We both think he made a sock account, as her profile was open at the time.

Oh I see.
I think people are a bit nosey but it doesn’t sound sinister. My ex was a controlling creep and used to go through my belongings, phone , emails etc so I understand the anxiety. It sounds like he backed off and left you alone straight away so I wouldn’t worry too much.

What's a sock account?

I would have challenged him on how he knew about your dear dad's passing - as that's private information. When saying he saw a post your sister put up, I'd have asked him how he saw that when he's not even on her friends list?!
I'd have let him know how it's obvious that he looked her up and I'd have told him to stop creeping.
Sister needs to lock down her profile so non-friends can't see her posts.

Sock account = made an account with a fake name/credentials to bypass the blocking of his genuine account.
I did ask him how he knew, and he said he saw a post on sisters page.
I know for a fact that sister blocked him years ago as one of the revelations was that he was shagging one of her friends, got friend pregnant.
Sister and I aren't that close, she leads a public life, and I'm private.