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Amazon now sells around a billion SKUs. It would take some serious Mechanical Turking to buy products, review them and due-diligence each for malware. The Amazon social features like Q&A and reviews are intended to crowdsource feedback after-the-fact. But until enough people die from being electrocuted from line voltage USB hubs or hoverboard power-supplies burning down their homes, regulators are unlikely to step in until there is greater public pressure on regulators to do so.