As in employ someone to go and trace users who post reviews to see if they’ve reviewed the same products? Maybe you meant make a system that can do it, and do

As in employ someone to go and trace users who post reviews to see if they’ve reviewed the same products? Maybe you meant make a system that can do it, and do it without false positives to not upset legitimate users when their own reviews are removed. I’m confused about the ease people expect this problem to be solved. It’s so easy to solve it exists on every popular platform: see the paid, fake reviews on the Apple App Store.