I'd be interested in the legal angle that CASA are thinking of using against this guy.
FWIW, the FAA is launching a similar attack on the infamous Mr Raphael Pirker alleging reckless and careless operation of an aircraft. That's a fight that'll be entertaining to witness...
I think the risk of drones at this scale against manned fixed and rotary wing aircraft in the vicinity represents a level several orders of magnitude less than the risks pilots are already facing from natural forces, wildlife, their own misjudgments and mechanical failure.