Again, I agree it depends on the country. China - terrible for it. UK / Ireland, depends. Completely agree that the business travellers are particularly guilty. Its a status thing I think. Wont be told anything by the crew or any "workers" at all. Remember a flight into BSB when some of the pax stood up, ignoring the crews PA (airline was BRA) and then we had to do a sudden stop due to Cessna overshooting junction on taxiway. Again, shocked the pax into sitting down.
Dont want to divert the thread, but same annoyance felt at people whos cellphones ring when exiting the runway!!!!
XSB