Mate I refereed League for a long ass time, I've seen it.
When I first got pulled into the junior rep squad, I was required to go to an Under 15s carnival. And U15s still played under the 'Safe Play Code'. And by the letter of the law, all and any breaches of the Safe Play Code must be penalised. I had many arguments with the coaches about this - but when push came to shove, I did what I was told.
So I had 3 instances in a single carnival game (12min halves), where there was 'foul play' under the Safe Play Code in the lead up to tries.
1 was flinging the player to the groud by his jersey
1 was pushing a player over the sideline
1 was a late tackle
All 3 happened in the same play as tries were scored. All 3 my touch judges ran onto the field. Had they happened in general play, I could have just penalised the player - no real harm done.
But all 3 players had to be sin-binned, because it happened in a try scoring play - and you can't restart the game with a penalty after a try has been scored.
I had to be escorted from the field by security. Coaches, players, parents were all ropable.
I packed up my shit, and drove the 3 hours home to the Central West after one game. Told them to jam it.