The Tamworth Oztag Association has warned players and spectators that it will no longer "tolerate bad behaviour", with the summer heat blamed for sending players "troppo".
In a post on its Facebook page, the association said there would be "no more warnings" for bad behaviour.
It was responding to a "couple of incidents this summer involving unsportsmanlike behaviour and intimidation".
"Please note: There will be no more warnings for either players or spectators, with our seniors given permission to ask those causing trouble to leave grounds," the association said.
It added: "We want everyone to feel safe and enjoy this social sport."
The association's development officer, Pam Potts, told the Leader that the unacceptable behaviour "reared its ugly head every now and then".
She is "sure" that the problem is worse during summer because of the heat.
"It's just a behavioural thing: people getting too competitive," she said, adding: "There's absolutely no need for it.
"But just every now and then you've gotta remind players that there will be consequences if, you know, things happen."
Potts said it was unnecessary for spectators to feel the need to add "their two cents worth".
In regards to suspending players, she said "you've got to deal with it, and be seen to be dealing with it", in order to send a message.