Don't Do It!
Professional pilots can be identified as those who are acting professionally at all times whether they are flying, navigating or communicating.
Most pilots don't operate or navigate the aircraft by compromising published or regulatory standards, so why do some pilots/ATCOs feel compelled to compromise published communications standards? There is enough frequency congestion as it is without ATCOs/pilots further contributing through the injection of innane chatter which may, in fact, compromise aviation safety.
So, the next time any pilot or controller feel the need to have a "chat", spare a thought for the pilot in distress who is waiting for you guys to finish so that he can get his "mayday" call in to ATC; or for the ATCO who is waiting for the pilots to finish so that he can advise each aircraft of that traffic that's about to enter their cockpits through their front windscreens!