This is idiotic at best, blatantly bigoted at worst. Collective reviews are changing the dynamic of consumer reporting. The only time that reviews wind up being skewed and unreliable is when something hasn't really been sampled and reviewed by many people.
Consider Google Maps reviews on restaurants. As a consumer I have found them highly valuable in avoiding restaurants that are poorly run and provide substandard food. The same is true for products that I should avoid on Amazon and other online retailers.
I do find that the higher the degree of intelligence and education required to understand and appreciate a product (examples: a book or technical item) the more it seems that the reviews are skewed by the individual competence of the reviewer,but that doesn't make the reviews worthless merely potentially misleading.
When I am reading consumer reviews of products, especially, movies, books and games/apps, I take this into consideration and look for telltale signs of ignorance in the review itself.