If the new person thought that flags were just a normal part of the site and no one freaked out, the new person would learn... Oh we can get flagged.

By the way, I disagree with the flag, but that is going to happen. Accept it with some grace.
If the new person sees someone puke, vomit and practically rage quit about it, they would think... Oh, when I get flagged I need to freak out.

You are training them... How are you doing>