Chiefs coach Dave Rennie says he is "shocked" to see Waratahs boss Michael Cheika escape with a simple warning after his recent breach of protocols.
On Thursday SANZAR announced that the 'Tahs coach and referee Jaco Peyper had been issued with formal warnings after Cheika entered the referees' room to talk to Peyper during the half-time break of their Super Rugby win over the Blues in Sydney.
Rennie says letting the Wallabies coach off the hook could create an unwanted precedent.
"I'm really shocked by it to be honest, because it's opened up a can of worms," he told Newstalk ZB.
"I think they'd be smarter to say, 'you can't talk to the referee at half-time. If you want to go through the referee, you've got to go through your captain'."
The two-time Super Rugby title-winning coach says other coaches will now want to talk to officials at half time, knowing they can get away with it.
"I just don't want us to be disadvantaged, so if the other coach is going to talk to him, I want to be in the room listening to what's said and have our say as well," added Rennie.