1) I agree that it's completely up to the Agents, and you, of course.
2) Well, since we do operate by the Laws of Narrative Comedy, so in all likelihood yes, they will hear it. (Moreover, people will probably be cutting their nails or doing something besides that that requires precision at the precise moment, so angry yells will most likely follow.)

1) If I may draw your attention to a previous line in the article in question: "Any other contents are up to the Agents that inhabit [the RC]." So, the agents can have whatever they want; it's just that Murphy's Law tends to prevent them from relaxing for long. But it's all for humor, so don't take it too seriously. {= )

2) I never really thought about this before. I think that people would definitely hear a scream like that, but wouldn't they also hear BEEPs from other people's consoles? Yet no one seems bothered by this. Hmm. HQ is weird.

~Neshomeh