PFA chief executive Gordon Taylor has branded Luis Suarez's conduct at Old Trafford as "disrespectful, inappropriate and embarrassing."
Suarez has found himself in the spotlight again after refusing to shake Patrice Evra's hand before Liverpool's 2-1 defeat to Manchester United.
The Reds striker was making his first start since he completed an eight-match ban for racially abusing Evra in the reverse fixture at Anfield in October.
And Taylor, who has worked tirelessly to stamp out racism within the game, feels it is time for the Football Association to step in.
"What Suarez did was disrespectful, inappropriate and embarrassing," he said.
"If anything, Patrice Evra was the victim and he was prepared to put his hand out.
"These players are expected to be role models but if we have a situation where nobody accepts the findings of hearings and just carries on regardless, all you get is anarchy.
"Now the Football Association have to step in because the whole situation has gone too far. Suarez had a chance to put everything to be in front of a worldwide audience. The fact that he chose not to is, quite frankly, depressing."