2018 Rd 8: Post Game Passion: Carlton vs Essendon

[Lods]

It is covered in the rules the game.

I guess the problem is to what extent do you enforce those rules.

15.4.5
Prohibited Contact and Payment of Free Kick
A field Umpire shall award a Free Kick against a Player where they
are satisfied that the Player has made Prohibited Contact with an
opposition Player.

A Player makes Prohibited Contact with an opposition Player 
if the Player:
(a) makes contact or attempts to make contact with any part 
of their body with an opposition Player in a manner likely to 
cause injury;
(i) above the shoulders (including the top of the shoulders); or
(ii) below the knees.

(b)pushes an opposition Player in the back, unless such contact
is incidental to a Marking contest and the Player is legitimately
Marking, attempting to Mark or spoil the football;

© holds an opposition Player who is not in possession 
of the football;

(d) unduly pushes, bumps, blocks, holds an opposition Player or
deliberately interferes with the arms of an opposition Player, 
who is in the act of Marking or attempting to Mark the football;

(e) pushes, bumps, holds or blocks an opposition Player when the
football is further than 5 metres away from the opposition
Player or is out of play;

(f) Charges an opposition Player;

(g)trips or attempts to trip an opposition Player, whether by the use
of hand, arm, foot or leg;

(h) kicks or attempts to kick an opposition Player, unless contact is
accidentally made whilst the Player is Kicking the football;

(i) strikes or attempts to strike an opposition Player, whether by
hand, fist, arm, knee or head;

(j) holds or throws an opposition Player after that Player has
disposed of the football;

(k)engages in rough conduct against an opposition Player which in
the circumstances is unreasonable;

(l) Kicks or attempts to Kick the football in a manner likely to cause
injury; or

(m) bumps or makes forceful contact to an opposition Player from
front-on when that Player has their head down over the football.