Clive Norling, Wales's director of refereeing, has issued a warning following the attack on Ireland's David McHugh during last Saturday's Tri-Nations match between South Africa and New Zealand in Durban.
"It is time some people realised, that without the referee, there is no game of rugby," Mr Norling said.
"Sadly, last season we had two incidents in our Welsh/Scottish League where referees were physically threatened.
"My major concern is the effect that an incident like we saw in South Africa could have on the recruitment and retention of referees.
"Hugh Banfield, the secretary of the Welsh Society of Referees, and myself have been banging the drum for the last 18 months because we feared something might happen because of of the global abuse of referees."
As the countdown continues for RWC2015, Tournament Chief Executive Debbie Jevans visited the Millennium Stadium to discuss preparations for the eight matches and reveal the positive news that 100,000 tickets for games at the home of Welsh rugby have sold in the last seven days.
Jason Harries is targeting a first win on the World Series circuit this season with Wales. The series returns to action this weekend in Dubai where Harries is part of a team hoping to build from its efforts in round one in October.
Wales skipper Jevon Groves says his side have addressed a few points from Gold Coast and aim to 'hit the ground running' in the next two rounds of the World Series, kicking off with this weekend in Dubai before heading off to South Africa next week.
Wales Sevens manager Steff Thomas is hopeful his side can build from a quarter-final spot in the opening round of the World Series in Australia when his side take part in the forthcoming double header in Dubai and South Africa.