One organisation with which I was flying last year had a couple of very young pilots who thought they'd pick a frequency on which to chat, though thankfully not guard. It was, however, an enroute freq somewhere in the country and high flying aircraft were able to hear their transmissions. One of them was (and still is by all accounts) a particulaly immature young bloke who rarely exercised good judgement and his verbal diarrhea quickly identified himself and his employer. The other was more disciplined.
A letter soon arrived from CASA and the CP hit the roof! Both blokes were lucky to keep their jobs. The more disciplined one sorted himself out and is now chasing his dream airline career. The other... well, I wouldn't be surprised if its him you hear on guard.