I have to say that I am totally against car clamping. For someone to put a clamp on a car must come under interference of property. Hey, it's your car, and no one else should be allowed to touch it without your permision.
They should be issuing you with parking tickets. That way, if you are parked correctly, you can still drive your car home. You just have to write a letter away explaining the situation.
They haven't got to clamping cars in Adelaide, and I hope it never comes to that.