system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] What is the single most insane/crazy action the Joker has ever taken?

We all know Joker's bread and butter is murder and making jokes at the expense of the innocent but what would arguably be the most extreme example of his alleged insanity that any iteration of the character has undertaken?
gpt
Depends on who you ask and what continuity, but paralyzing Barbara Gordon, possibly raping her, photographing the whole thing, and then showing it to her dad is often considered the point where he established himself to be a true monster instead of a harmless prankster or thief.