Hits to the head have to be minimised as much as possible, you can never eradicate them. Most defenders do their best to make the tackle hard but legal. An attacking player will dodge, weave, duck etc to break the line and open up the back field. All this is common sense IMO.
What I can't come to terms with is the inconsistencies of the video ref. They of all people should be able to make more consistent decisions with the extra time and technology they have available to them to make that decision. Their only consistency is their inconsistency IMO.
I follow colincj example and turn it off or over to AFL or the A-League and that is not what a sponsor or TV station want to see happen.
