Not tier1 operators.I've seen it 2 times at the place I work (kinda major) and told the guy he was an idiot for doing it both times (GREAT CRM on my part!!!) and I've seen it three times on the jumpseat. One was a 175 RJ operator, one was at your shop and one was at United (on a 777 out of all things).
Every. Single. Time. it was the captain doing it.