Had someone lose it because a girl arrived around 11pm on her first night, unpacked a bit, took a shower, normal stuff. Was it a little noisy? Sure. Did it bother me a bit? Also yes. But that’s literally hostel life.
As long as someone is being reasonably considerate, some noise, light, and movement is just part of sharing a space. Expecting complete silence and zero disruption in a dorm is unrealistic.
If that kind of thing drives you crazy, that’s fine. But then book a hotel. Don’t stay in a shared room and get mad at people for existing.