The captains of all 18 AFL clubs have united and penned an open letter to fans pleading for an end to “unacceptable behaviour” towards Adam Goodes.

“As leaders we are accountable for everything we do on and off the field, and we think it’s just as important for us to be accountable and call out unacceptable behaviour when we see it. And sadly this week we have all seen it,” the captains said.

“Enjoy the game, celebrate the success. But don’t boo, jeer or taunt players because of who they are or what they stand for.

“We call on all supporters, from all clubs, and industry leaders to join us as we make a stand against vilification.

“Enough is enough. Enjoy the game, celebrate the success. But don’t boo, jeer or taunt players because of who they are or what they stand for.

“We encourage supporters to demonstrate zero tolerance and report any behaviour which vilifies a person on the basis of their personal characteristics, such as race, religion, gender or sexual orientation.

“When a fan buys a ticket to the football, they don’t buy the rights to have their respect and decent behaviour left at the gate.

“When you come to the footy, join us in putting a stop to offensive behaviour. Be the voice that makes a positive impact.  Stand with us to ensure our game remains great for everyone.”