Fat boy is a joke - as for criteria I think we could all list some possibilities.

I don't believe Ganson was actually going to do anything at the time, he seemed to miss it or ignore it. It was the intervention of the touch judge that brought a penalty.

I don't think he was going to bin Horne until it was pointed out to him that he had given a team warning.

He actually looked at the big screen to see who to bin for that one.

Not a red for me, should have got 10 mins though.

When was the last time you saw a player get sin-binned for a high tackle? I literally can't ever remember it happening. It's always just a penalty or a red card.

Correct - calling for 10 mins is just a nothing call.

will only bin after a few high shots, although this has now been replaced by the ref doing gangnam style for a team warning

Preventing a try scoring opportunity.

So the high tackle wouldn't be the reason for the sin bin then. I've never seen a sin bin for a stand alone high tackle.

It's no different to me than fighting, why should it not be given 10 minutes? Either way it wasn't bad enough for a red.

I'm not saying it shouldn't be a sin bin I'm just saying it never happens. It's only ever just a penalty or a red card. Can ever recall somebody getting a sin bin for a high tackle?