You may not have noticed but I stopped bothering to make sensible comments, on this thread, some time ago because it is obvious that there are those that believe it is fine to flout both the law and others' safety and no amount of "sensible comment" will change their minds.
Maintaining a listening watch is pretty pointless, if you have a huge barge bearing down on you and you do not know the protocol, to actually make your intentions clear, or find out the intentions of the skipper, of the barge.
You may be an old sea dog and so, have somehow absorbed the correct radio protocols (though you don't ever demonstrate any great knowledge of seamanship so your nautical credentials are unclear) but recommending to others that they don't need to learn, the correct way to operate a radio is just plain irresponsible.
Just because you feel able to 'fly by the seat of your pants' doesn't mean others can.
Operating a radio, in the event of an emergency, is not as straightforward as you make out and receiving the correct training will help someone stay calm, relay the correct information, in the correct manner and make the chances of a successful rescue far more likely.
If the price of that is £100 and a day spent in a classroom then I think it is well worth it.
Not only that but I'm surprised that the forum admin are okay, with you encouraging others to break the law.
As I said, none of this will convince you, or Evo, that it is best to get the training so here's a chimp on a pushbike: