2018 Rd 8: Post Game Passion: Carlton vs Essendon

[LP]

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:

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

Enforcement of this would stop those stupid situations were three or four players maul each other or form the stack of bodies. There is the ball carrier and the tackler, the next player who joins in should be penalised for holding the man.