The Hammonds don't want them, so it sounds like that group are deliberately trespassing, perhaps breaking and entering, on private property.
The group who stay will run out of food and warmth very soon.
The one tough guy with a death wish will eventually fall asleep, and then wake up in manacles.
I seriously doubt they would go to the Hammonds without being invited. It’s likely the Hammonds are giving those who want it.....an out.
Yes, I imagine Ammon & his pals are mere babes-in-the-woods when it comes to the land...