From a certain perspective, yes. Bare in mind, however, that there are certain, obvious differences between [Muggle] quidditch and [Wizard] Quidditch: muggles don't fly, the bludgers are thrown "dodgeballs", the Snitch is actually a person (Muggles… bless their hearts), and catching it is only worth 30 points.

I imagine that muggle-friendly wizards would be impressed and pleased to see how creative they adapted the sport, while those who consider wizards superior would look at their attempt in disgust, and discard its existence and not worth the time or energy it takes to care. So neither side will consider it 'appropriation', in the negative sense.

I'm not an expert (and I know this sub has harsh rules on this kind of thing, please let me know if I'm overstepping my bounds) but I do have extensive experience living with and around Muggles. Many of the Muggles I know do partake in what they know as Quidditch; if you can even call it that without actual flying, bludgers, or even a golden snitch.

Seeing as Muggles do form the majority in every country Muggle Quidditch is popular I would say it's only a matter of time before Muggles come to see their version of Quidditch as the "real" one. In 10-20 years it very well could become a major sport for them.

However I highly, highly, highly doubt the Wizarding community will ever choose to watch a bunch of Muggles mucking around on the ground over a real Quidditch match.