Originally Posted by
CPMaverick
I would not recommend seeking an ETA as advised above. It is guaranteed to be rejected and would only risk causing more issues. It would notify Australia that you are coming and suggests you intend to enter the country which you do not. In normal circumstances an ETA is nice to have for transit in case of flight delays. Not in your case, it's a liability.
Getting rejected is the exact purpose.
Australia will be notified about OP's transit no matter what. So getting the ETA means OP can drop the plan.