I had a situation once when the wife and I were flying back from from Spain, as has already been said, there was one chap who pulled out his phone to use FR24 "The flight is running 2 hours late, ignore that message up there, we wont be leaving on time!" So about him and 10-15 others went off to the bar to pass the time.
Amusingly, the company we were flying with were having an aircraft swap. Our flight left on time and even landed early back in the UK.
OMAA