Unfriend him on Facebook
 

You can unfriend him on Facebook, he will not be notified that you have unfriended him but he should not be able to contact you again. In Facebook go to the help center and ask how to unfriend someone and they will give you instructions on how to do that. There is no need for you to deactivate your account just block his access to you.
Good luck.

Well, except you are here on a social media.

Except on here, if anyone has any sense, they are not who they are!
I have a Facebook account, that is just for the family.
Even my details on that page are false., but our kids and friends know it is me.
There is enough real information about everyone floating about on the internet, without adding more to it unnecessarily in my humble opinion.

Regarding OP's problem, I agree with what was suggested in earlier post, and just unfriend the person. Seems easiest way out, without actually giving other person a straight refusal.

Sounds like you've done what you need to do. Peace.

First of all I would not take advice from someone I do not know and on this site! Make a decision and run with it.

If I got off Facebook, I would lose my Gary Larson, Dilbert, Amateur Guitar, and other valuable groups and my family connections! No way!

Why do I sense he’s setting you up for money? Sister has a drug problem, hmmm

Living your life on social media will only result in hacks and scams. There are those out there that will take advantage of every opportunity to scam you.

The older you get the more memories come flooding back because you have more time. There certain triggers ( death. Weddings, birth etc.) that bring memories to the fore. You cannot grow old friends. Make contact and take the good memories and enjoy. And share the loss of loved with a little sympathy and pain.

Tell the person why you don’t want to get involved in the situation- you’ll sleep better at night knowing you didn’t run from the issue by”unfriending” him….

it's funny you ask that, because I constantly wonder why people treat FB like that. It's an internet forum - you owe no one anything, including the truth. The internet has long been the mask for people. You can be whoever you want to be, if someone wants to judge you then it's their ego and problem not yours.

For those that came into the internet when AOL ruined it, you wouldn't see this it just seems like a huge social party - the internet was never a huge social party, it in fact, was a place of information that was far more accurate and far less littered than it is today. Now everyone has to document their life like it matters to the world - trust me it doesn't all you are doing is helping the hackers.

Quit worrying about all that and just do whatever you want to do - that's it

Facebook
 

You kind and sensitive nature is a gift, but we all have control over how our gifts are shared. Clearly, you are still experiencing your own losses and this acquaintance seems to have missed that. Perhaps politely acknowledge that this isn’t the best time for you, but that you’ll keep his concerns in mind for the future. Then, if he still doesn’t get the message either unfriend or block him. Lots of choices. Good luck!

Whats the bug deal? Unfriend and block them both. They don't need to know your business.

If you feel that you want to contact his sister then go ahead. She wasn't the one being tactless. That is her brother. As far as he goes, just disregard him. If he wants to be considerate and contact you then fine. Tell him how you felt about his lack of sympathy. If he continues being inconsiderate toward you then he is being self-centered, and the best thing to do is recognize that he is the type of person you don't need in your life. Stay away from a narcissistic person like that.

My family is also spread across the country. We have a private family Facebook group where only the members can see what is posted.