I kid, but why not just leave it at, "Don't be a jerk or you may be asked to leave the Conference with a refund." Isn't that kind of the unwritten Code of Conduct of everywhere?
911: Ok what's the problem? Can you tell me exactly what happened?
CALLER: This hacker...
CALLER: Was reading yo-Mama-so-fat jokes.
911: Do you have any evidence of that?
CALLER: Absolutely, you can check his browser history to find the link to what he read.
911: Alright police are on their way, you can meet them when they get there. What's your last name?
CALLER: I'd prefer to remain anonymous.
Kicking a poor - sorry, "economically diverse" - kid out of a conference for transgressions for which no examples are given is one thing. Don't you think withholding their return trip home from the conference you brought them to is another, especially when you know they can't afford it? Suppose it keeps them on their best behavior, if that's the intent. Probably worth noting that no Brown student has to worry about this level of punishment.
From Microsoft's latest 10-Q SEC filing: "Even as we transition to a mobile-first and cloud-first strategy, the license-based proprietary software model generates most of our software revenue. We bear the costs of converting original ideas into software products through investments in research and development, offsetting these costs with the revenue received from licensing our products."