IMO, an on-field punch up is not violence. Even if it is an all in brawl, I still don't class it as violence as long as it's 6 of one and half a dozen of the other.

If it's unprovoked, one party is defenceless or comes as a cheap shot(Tuilangi on Ashton in RU, Farrell's headbutt for Wigan v Saints(?) a fair few years ago, or Kelvin Skerret's forearm on Morley for example) then this is where it becomes violent IMO.

Violence has no place in our game but a punch up does.

For the sake of balance, I have also experienced agro & violence in Rugby Union, as well as League, though I tend to laugh it off, and get on with it, and hit the dirty fekker harder next time he has the ball

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We don't play mini or junior fixtures against our local large town because one of their parents assualted one of our juniors during a match a couple of years a go. They either change their culture or we don't go near them.
We still played them at senior level though and I found their 2nd team to be a good bunch last year (especially the guy who I butted heads with - we both ended up chatting in casualty), but their firsts and their supporters were a bunch of c***s. Thankfully not in our league this year.

We do seem to suffer a discrepancy between our adults approach, and our juniors.

As usual, some good & intelligent posts from the board's coaching fraternity. Dunno whether others feel the same but I always find this stuff worth reading.