“Royston Idlewind and the Dissimulators” is the name by which the 1974 Quidditch World Cup is known.
The tournament was famous for the attempt by the ICWQC International Director, Royston Idlewind, to ban crowd members from carrying wands. This led to a feverish and heightened atmosphere in the stands and a very noisy musical instrument, the Dissimulator, became a feature of every match (QWC).
As Idlewind sat down in the VIP box before the final (Syria vs Madagascar), the real purpose of the Dissimulators was revealed (QWC).
The final match was eventually won by the Syrians. However, the real loser overall was Idlewind in his battle against the Quidditch fans (QWC).
At the Muggle football FIFA World Cup 2010 held in South Africa, the television coverage was disrupted by the noise of the crowd's colourful Vuvuzela horns. The Dissimulator seems to be the wizarding equivalent of this "musical" instrument (Wikipedia).
As Idlewind found out, it is very difficult to get the wizarding world to change their habits and traditions. However, he does have something to say about when interviewed after the events following the 1994 tournament:
"a wand ban doesn’t look so stupid now, does it?"
-- Royston Idlewind, retired, 1994 (QWC)
Lexicon timeline of Quidditch
Lexicon list of World Quidditch teams
From the Web
WizardingWorld.com (Pottermore) features:
Writing by J K Rowling on Imgur (Daily Prophet coverage of the 2014 Quidditch World Cup, originally from Pottermore):
Harry Potter Wiki: Quidditch World Cup
Tags: banned competitions/competitors disruptions instruments match noise noisy Quidditch history sports tournaments wands