Sharks coach Shane Flanagan has hinted he'll be challenging the NRL's $30,000 fine that was dished out on Tuesday.
Flanagan and Manly's Trent Barrett ($20,000) were both hit with fines for the referee rants following their team's elimination from the finals last weekend.
NRL CEO Todd Greenberg told the game to "grow up” following the pair's remarks saying they hurt grassroots footy.
"I think that's ridiculous, I've got to stand up for this club and the game,” Flanagan told Channel Nine.
"My sponsors, my supporters of this club want me to stand up and my playing group.
"We just questioned the decisions and I think I've got a right to be able to do that.
"Does that damage grassroots? Is that disrespecting referees? Not in my view.”
Flanagan said he worked with the grassroots area of the game on a daily basis.
"I've got academies with hundreds of kids with boys and girls in them. We are grassroots every minute of the day,” he said.
"(Greenberg) had a shot at the other coaches. Trent Barrett runs water for a team, Brad Arthur is a coach of a (non-NRL) team.”
When asked whether he felt insulted by Greenberg's comments, Flanagan replied: "Yeah, 100 per cent.”