I'm watching a 2-hour film on YouTube called Backstage on the Rumours tour. I think inane questions from "journalists" drove the band to drink and drug themselves into a stupor.
https://www.youtube.com/watch?v=byVhParOv7c

About 13 minutes in, John is wearing a Criteria Recording Studios t-shirt just like Randy and Joe Walsh had!

P.S. There's Carol Ann 14 minutes in - she was very, very pretty.