Yes, you're on the air, but...

An announcer I know once said it concerned her that too many student DJs at her station had the attitude, "We must be good (announcers) because we're on the air."  After hearing announcers on that station stumble through newscasts, having to make such corrections as, "The team is the newest NHL aff.  Um, affiliate, I mean..." or lead into music sets with polite but stilted intros such as, "Here is a song by Duke Ellington.  Please enjoy it," I couldn't dispute that.