I don't work in the industry but I fly DJ (aka V Blue) a lot,and yes the jokes are annoying,especially when they are old,bad jokes when I'm trying to catch up on paperwork etc,but what really annoys me is the music played way too loud on boarding!
On one trip last year it was so loud I had to ask the F/A to turn it down ,she did so,reluctantly I thought,I even considered never flying with them again but have relented after writing to the head office and receiving a polite reply and a promise to examine the issue.