system
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human
[Monsters Inc] Why are Mike and Sully allowed to get away with extrajudicially banishing Randall? Why the fuck is banishment even a punishment in the monster world?

This always bugged me every time I watched Monsters Inc but like Mike and Sully straight up banish Randall, there's no due process at all, like yeah he did try to kill them and take Boo to the scream extractor, and he did help banish Mike and Sully earlier, but it doesn't make it right.

He should face justice. When he got banished he got mistaken for an alligator and knocked out with a shovel. From the accents the place he got banished to is probably the American south, and they eat gator down there lol Getting killed and eaten is not justice.

But even if that didn't happen, banishing Randall makes no sense, he can literally turn invisible! Like so what if the door he got thrown out is destroyed, all he has to do is find another human settlement, find kids, find another door, and wait. It didn't take long for Mike and Sully to come back after being banished, it would probably be a breeze for a monster like Randall. He could probably sneak back, leave Monstroplis and just chill wherever, it's not like anyone would specifically be looking for him.

And banishing as a whole is pretty messed, throwing someone into the human world, cutting them off from their friends, family, fellow monsters and expecting them to survive in a strange land and never ever come back is just so many levels of fucked up. And add on top of that crazy humans trying to hunt you down (iirc Bigfoot was mentioned as banished) it sounds like a nightmare.

That's not justice, hell, even as retribution it goes way too far and I would never want to wish that upon anyone. Yet it appears to be an accepted punishment in the Monster world, the Abominable Snowman is banished for mail tampering (implied at the end of Monsters University) and to be fair, that's a federal offense in the human world, but banishment is extremely immoral, there's a reason it's no longer a thing in the human world.

Yeah, the monster world thinks scaring children is good for generating power so they're already operating on some dubious ethics, but banishing another monster to what is basically another dimension isn't right, and also doesn't make sense. Imagine if the human world discovered the existence of monsters, that puts the entire monster world in jeopardy.
gpt
Monster justice is not subject to human morals. Banishment is clearly an acceptable punishment by the society there, as it has been in the human realm in the past. 

"The problem with aliens is that they are just so darn alien." Larry Niven.