"It should be a long time out of the game," Harrigan said.
"Because that's what they are saying about anyone out there approaching referees, and trying to retain young referees over the abuse they all cop.
"To cop it from a first grader to say I'll smash you or something similar if that is what he has said. To me it has to be rubbed out to set an example, rubbed out for 12 months.
Harrigan said retaining young referees continued to be a problem for the NRL, because of the poor treatment they receive.
"Out there at park football where these young referees don't have any security like first graders do they walk to their cars, or their mums and dads are picking them up they shouldn't be fearing, they shouldn't be worrying about people coming up to them and abusing them," he said.
"Every time you see someone coming up to you you start to feel intimidated or panic about it, you start to think is this bloke going to have a go at me.
"If two footballers walked up to you, first grade footballers that are well known and they say something which was something in a derogatory way, well then there has to be a heavy punishment because they are setting an example to the mums and dads out there."
- AAP