Pups are less likely to make a noise if they think the returns will be low for example, with carers that are stingy or in bad condition and thus have less food to spare.
It's clear that some of the people raising the most noise are trying to make this less about the horrible death of a young man and more about claims of racial resentment that may or may not exist.
The only time I ever saw Chris lose his temper was when we were sharing a double room our last year, and some less enlightened brothers decided to make a bunch of noise late at night during finals week.