You can, with education.
In this case, rather drowsily taking a walk and mentioning to him that his preparations sure are loud for so early in the morning. It likely just hadn't occurred to him as he's thinking about what he has to get done.
X2. But it has to be done nicely. And yes, people do forget their surroundings at times when they are focused on other tasks. Many forget how much sound travels in a quiet campground. As the saying goes, "if you aren't part of the solution you are part of the problem".