In all seriousness, any head high tackle is already banned. By making the blanket statement that shoulder charges are now banned, will only bring up more interpretation confusion.
What would constitute a shoulder charge? Leading with the shoulder? Do the arms need to wrap around also, and if so, by how much before the shoulder comes into contact? Are shoulder charges only where the player launches themselves? etc etc
I've seen plenty of front-on tackles which wouldn't be classed as a classic shoulder charge (i.e. defensive player standing square to the runner and arms stretched out to go around the player); but where the shoulder is the first thing to make contact; and it makes contact with the head. Plenty of these front-on tackles which make contact with the head are just as devastating to the player on the receiving end, then if they were hit by a player standing side on with their arm down to the side (classic shoulder charge).
Any contact to the head needs to be treated more harshly and consistently; even the most accidental of head contact by a player with the cleanest rap sheet should be a min 2 week ban, even with an early guilty plea. Then move up from there based on severity/priors etc. The players/coaching staff etc will then sort themselves out to avoid those bans at all costs.