When a radio station is about to change formats without retaining its on-air personnel, a devil-may-care attitude sometimes slips into the announcers' delivery during their final days. On one station several years ago, I heard an announcer say, "I forgot to get an update on today's business report, but it's a little late to fire me now..." Another announcer, during his last week on the air at a different station, had just read the weather forecast. At the end of it, he said, "You know, I forgot to get a current temperature, but, hey, you're indoors. What do you care?"
Although it's ill-advised to rant and rave on the air just before a format change, it's worth remembering that announcers are human. A bit of subtle on-air venting now and then is understandable.