Agreed Chippy
A person like that needs to be flogged publicly, unfortunately not allowed. I do not know about other states, but in WA 99% of people in the construction industry have "white cards". I have one, and I happily show it if I am asked, as well as my licence to make sure the customers or people know I am who I say I am, and I also give them my trade registration number if they wish to check up on it. I am always happy to wait for them to check prior to starting any work, and then give a quote of the maximum something may cost, which usually ends up less than the maximum.
Regards
Tjupurula