The wizards at the Quiddich World Cup wandered about in all manner of unusual garb. An outfit that consisted of a kilt, a poncho, and a pair of rain boots was tame in comparison to some of the outfits the wizards from other countries wore. Contrary to appearances and the fuss one rather elderly wizard was making, it was only the most isolated of the Purebloods who actually didn't know how to dress. Everyone else had eyes and could clearly see what was going on when they were amongst the muggles. The unusual garb was more of a badge that marked one as a wizard. When in the muggle world, another wizard would be able to spot you right away, and know to acknowledge your presence.

Barty Crouch's impeccably neat muggle suit was another tell as dressing more muggle than the muggles themselves was another sign of wizardry (one that led to the confusion with Vernon Dursley - who wore the most boring suits ever - on November 1st 1981 as the wizard who had hugged him had believed that he was going incognito and had called him a muggle in more of a nod, wink, grin, "yeah right" manner).

It was becoming harder to tell who was a wizard these days as the younger generation had sided with the muggleborns who didn't understand and took this habit of dress as a sign of backwardness. That, and the clothes the muggles themselves wore got stranger and stranger every year.