They need to ban a lot of those 'Top 500' reviewers who just post positive reviews for free stuff. Half of them don't even bother to do anything more than re-word the listing and take a photo of it. You will see this with a lot of grow light reviews, no grow tent or plants, just a photo of the light hung up or on a table and a copy and paste of the listings bullet-points minus the spelling mistakes.
That being said some of the obviously fake ones are pretty funny especially when they try and incorporate english slang into their Chinglish.