Okay guys, what about the other problem of changing frequency and immediately transmitting on the new frequency?
I was always taught to listen out for a few seconds before transmitting in case you interjected before someone had readback an instruction from ATC. It seems to happen all too frequently, and unfortunately the worst offenders are BA crews (not picking on you cos I wish I was one, with those allowances!).
I'm sure I'm not the only person wound up by this other bad practice.