Penalties for such stupid behaviour exist:
CASR 91.360:
The pilot must, to the extent practicable, land and take off into the wind
Strict liability as well.
Remind me to try driving on the Right hand side of the road, other drivers can just get out of my way.
If there are "operational reasons" such as training, then by definition the person performing the downwind circuits must cease and desist once another aircraft arrives and wants to land.
To put it another way, you can't require that someone else conforms to your stupid idea just because you got their first.