system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] Some Space Marine gave me the Emperor's Unholy Finger and told me to "Shove it in my Eye of Terror" Who do I contact to get them punished?

The guy was wearing Yellow and part Red with a big looking face on the side, and said something about being Angry, but that's irrelevant now. 

What's the Chain of Command in Space Marine chapters?

 Who's at the top, who's at the bottom? What organisations hold sway over the Adeptus Astartes? Who do I contact to get that marine punished?

How will they be punished? Does that depend on my position in the Imperium? I am quite  rich Noble man who has a Knight to his name you know!
gpt
Are you kidding me? You, a human, with influence that probably spans over a single planet, is daring to even THINK that they deserve an apology, or some sort of recompense because a Space Marine hurt your feelings?

Let me tell you about that Space Marine. If he's average, he was probably picked up when he was a child because he slaughtered an entire pack of wolves, or killed a fully grown Ork, or murdered his entire village. He was then pushed through training that only 1 in 1000 survive, and he was then given surgery to ensure that when he was sent to battle, he was as strong as an Ork, as smart as a Tau and as durable as a hab-unit.

He was then given the best weapons and armour that the Imperium can forge, and sent into battle. He has faced the horrors that lurk in the shadows, and he has fought the beasts that scream through the cosmos that your petty, insignificant world floats through. He has been doing this for decades, and was a hardened veteran before your father was even born.

To him, you are nothing but a bug. The Imperium would gladly sacrifice 100 people like you if it meant they could have one more Space Marine. You can complain all you want, but don't be surprised if you are, at best, laughed at, and at worst, shot for daring to question the actions of one of the Heroes of the Imperium.