Happening with some Intel CPUs as well https://www.amazon.com/Intel-BX80673I97900X-Core-i9-7900X-Processor/dp/B072KTSCCS

Like yeah, the i9 isn't the best choice, but reviews like these are just useless, it's not what they are for, and people are rating them as helpful: http://i.imgur.com/WQ10BO2.png

Unfortunately I don't see a way Amazon could really effectively curate the reviews without just limiting it to Verified only.