Did anyone fail DP bc of plagiarism / AI

looking to hear anyone's story who failed / were at risk of failing bc of any type of academic misconduct. I'm really interested in what "actually" happens, is it justified, bc in my school (and probably other schools) teachers emphasize that using AI / plagiarising, etc. gets your diploma revoked, it's an incresibly big deal, and you're ALWAYS caught.

Asking out of pure curiosity, I'm not looking for tips on how to cheat the system lol