What a load of B$%££".
The recent comments are all very interesting and nothing wrong with a bit of in depth analysis but in terms of the jist of the original post the thread is out of hand.
The real issue is there is no excuse for jumping in on any frequency without listening first. If you listen first you would realise their was emergency traffic on the channel and leave them be.
Listen before you speak and there is far more chance what you say will make sense.
Seems pretty simple really?