system
Given the following post, respond as if you're commenting on Reddit:
human
[Harry Potter] What happens if you do use an Unforgivable Spell?

Harry uses both Imperius and Crucio in Deathly Hallows and everybody took it quite lightly. Is it just a cultural/legal thing that you shouldn't do; so basically nothing happens if nobody reports it?
gpt
No, the punishment for using one is life in prison in Azkaban, that's made quite clear.  

But by the time of Deathly Hallows, Harry was already an outlaw an "public enemy #1," so him using them or not didn't matter, he was already wanted. Also the ministry at that time was controlled by Death Eaters and was quite happy to allow them to use the curses freely.

Also not many people witnessed him using the curses... And anyway, when Voldemort is defeated and the Ministry of Magic is restored, the new government seems to be quite favorable to Harry, so even if they knew, he'd be forgiven given the circumstances.