A leading referees' charity has called for an inquiry into the touchline behaviour of managers after ugly scenes at several Premier League matches.
Jurgen Klopp's red card for berating a referee's assistant during Liverpool's win over Manchester City was among a number of flashpoint incidents.
It came on a weekend where Merseyside Youth League games were postponed amid ongoing issues with referee abuse.
"People mimic what they see on TV," said Ref Support UK CEO Martin Cassidy.
The Football Association is looking into incidents on and off the pitch at Anfield as well as Manchester United players surrounding referee Craig Pawson at Old Trafford in their draw against Newcastle.
"For years, we have said the dissension towards referees comes from the top down as well as the bottom up," Cassidy added.
"When you see world recognised figures like Jurgen Klopp and Pep Guardiola behaving like that, it is then replicated by people in youth football and perpetuates the idea that it is OK to do it.
"The time has come to have some form of inquiry into the behaviour of people on the touchline - it goes on and on and I don't think people understand the ramifications it has at grassroots level."