The referee ignored the linesman and it's possible to get in trouble. A topic that is highly discussed is if the referee intercom is recorded during the games.
According to "Live Sport" , it is rumored that there is an audio document about an obvious "no call" in which the linesman says to the referee: "It's a penalty. Give it or you 'll be exposed".
The referee did not hear him, continued the play and the next day, "monkeys" were pictured in the headlines of the newspapers. If corruption Investigator, George Andreadis, has an audio document in his hands, the refereee has to find a very good excuse to get away with this. And that because he is called after Easter in front of the corruption investigator to receive the indictment about the "criminal organization".