I'm going to ghost someone I met online
Who is this person you want to ghost?
I met him in an online forum for young liberals.
Well if the person is only online then ghosting wouldnt be the worst thing in the world. However, understand that ghosting someone can be pretty emotionally upsetting. Maybe telling the guy that you are going to be gone for a while would work out better.
I want to leave him feeling upset. He was a jerk.
It's not really a big deal to ghost someone you don't know well and only know online. But to try to upset someone on purpose isn't very nice. You should just drop him a very quick note to let him know you won't be there anymore.