I'm going to ghost a friend from college
Why do you want to cut ties with them?
This friend just doesn't want to leave me alone! It's either ghost him or I leak private information about him.
Someone who does not leave you alone is so obnoxious. Ghosting him will probably only make him stalk you, and leaking information about him will make him want to kill you. I would just leave him alone and make sure you get a restraining order if things get ugly.
I left him alone before and it just got worse. I can't leave him alone any longer. I have to do this.
I think that you should try to talk to them. I think that ghosting them with no explanation is just going to hurt worse for both of you.