lol, welcome to UHF . it i somewhat disgusting what gets said and goes on, on channel 7 thats for sure! the funny thing is it's the same people over and over doing it. mainly towing companies i think.
some UHF info for you here http://www.uhfcb.com/UHF--Channel-Infomation.php
scott you might also find truckies using chan 29 down your way or at least goldcoast area and south. Brisbane usually chan 40