system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar] Does Bumi personally pass judgement on every single crime that goes on in Omashu?

Aang and his gang were merely a bunch of kids messing around but that seemed to warrant the judgement of the head of state.

Also bear in the mind that Bumi did not know it was the Avatar until he saw Aang's face.
gpt
They may have been a bunch of kids messing around, but they were messing around with critical city infrastructure when they were riding the chutes. This is what got Bumi’s attention. 

Think of it like how (at least in the US) what would normally be misdemeanor larceny suddenly becomes a felony on the federal level when it involves mail delivered by the US postal service.