You think that in a world full of yukkuri that they would installed some sort of yukkuri proof weight activated doors to prevents shithead like these from entering I mean come on.
They've not well-behaved, but not shithead. Look at Anon's actions in that image; nobody's going to be intimidated or awed by that. You think any yukkuri that doesn't roll over and praise Anon for letting it live is a "shithead."
The single act of claiming that someone's place, be it a home, a farm, a shop, etc. is their yukkuri place is already a shithead trait, and they just get worse to the point of then shifting blame on the weakling lying about the "weakling saying it was ok for them to take the place as their easy place".
Non Shithead yukkuris, if hungry, may call the mister and politely ask for munch munch and/or sweet sweets out of hunger, or water. Non shitheads wouldn't insult a mister and look down on him or her. Neither would they invade someone's place and say it's their easy palce now.
gotta fix a mistake, when the marisa shifted the blame, she actually said "the weakling said it was okay for us to munch munch here.", not like it changes their proper label as shitheads, but it's better to correct myself when i did a wrong quoting that let it pass.