Its in the job description to gain information and that what he was doing. Is it wrong for a repeater to ask Dwight Howards teammate if they know anything about him possibly demanding a trade? Or asking Albert Pujols teammates in STL if they think he's gonna stay there or sign somewhere else?
Regardless of what Yng thinks about Coach A he didn't do anything to bash him or attack him. He just asked a question about him.
When I read the interview and got to that question, my immediate thought was that it sounds like the coaches thought they'd agreed to give a little bit back by agreeing to a puff piece for the fans... and got put on the spot with a question about something they had no knowledge of and wouldn't have thought was appropriate for them to comment on even if they did.
In probative journalism what buffscoop is? If so, then fine. Then stop cheering for the team. Stop keeping information under your hat that you think could be damaging to the program or to the certain coaches or players that you like and support. You can't have it both ways.
Even for beat reporting, it was bush.