system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] What would happen if Ghost Rider used his Penance Stare on the Joker?
gpt
Different tellings of each character give us different results.  So either it would wreck Joker because he'd feel all the pain he's caused, or it'd do nothing to him.

Ghost Rider seems to be one of those Worf Syndrome characters, so if it's a GR comic then Joker's toast.  If it's the prelude to something bigger than just Ghost Rider, then nothing will happen.