It wasn't a food fight. And it was a silly issue, really.
What happened was: The class president, and the best looking boy in the entire class, was banned from the senior prom (class of '61). His name was Gerry Drinkwater. I don't recall why he was banned from the prom, but it may have had something to do with Gerry's inappropriate actions OFF campus, or it may have had something to do with his car and parking illegally?
Anyway, Gerry was banned and in protest the entire class of '61 decided to boycott the cafeteria. All I remember of the "event" was that we didn't buy any food for a week or so -- like the school administration would care if the seniors didn't eat their lunches for a week -- and we all wore signs that said: "Don't drink milk, drink water instead." Get it?
Just something I recall from those Triton years.