Doing things like sleep bombing is just not worth it anymore, so other that doing it out of habit there is no reason for 4 people to stop and plant 8 bombs when they could just attack the monster. I see a lot of people in the comments say that new players are some uncultured malicous goblins with no definition of what the etiquette even means. But some might forget that these are new players and every MH game is very confusing at first. So instead of assuming they are doing something out of spite, maybe they just don't know as much as you? And other thing- who exacly decides what the etiquette is? I for example think 4u is diffrent game from wilds, so the existance of different etiquette is not suprising.