Fake reviews: How the Facebook 'factories' are still ripping us off

Months after a Which? investigation into the manufacture of misleading reviews on Amazon, most are still active

Consumers continue to risk being ripped off as a result of fake review "factories" on Facebook that manufacture misleading Amazon product reviews, says Which? It told Guardian Money that "nearly all" of the Facebook groups it uncovered last autumn were still active this month.

Earlier this week it claimed Amazon's system was being undermined by a flood of fake five-star reviews for unfamiliar brands. Researchers analysed listings of hundreds of popular tech products and found top-rated items were dominated by brands with names such as Itshiny, Vogek and Aitalk, many with thousands of unverified reviews.