The all time best was when Howard Cosell was calling some Monday Night Baseball or Football game and some guy cut into the audio and said “Howard Cosell, the great state of Texas hates your f#$%ing guts!”
In DC, there was a sports radio host named Ken Beatrice. Once he was interviewing the then-head coach of the Capitals, Jim Schoenfeld, who had gotten into a spat with referee Don Koharski. Suddenly, someone broke into the phone conversation claiming to be Koharski.
Sometime later, when Beatrice was interviewing then-Redskins General Manager Charlie Casserly, someone broke into the conversation claiming to be his predecessor Bobby Beathard.
Both times, the caller claimed to be calling with an emergency.a
I got my own stupid 15 year old stuff there also.