A few years ago, a couple of Virgin Blue flight attendants thought it would be hillarious if they called out the brace commands just before the aircraft touched down.
Several passengers were not impressed and made formal complaints to Virgin as well as to CASA.
After an investigation the flight attendants were sacked.
Very unprofessional, especially when they treat safety related issues like PA's as if it was a joke.
I wonder if the travelling public would think it was funny if they heard the pilots say something like "oops, I wonder what this button does if I press it?" on the PA, just as a joke.