Having worked in ecommerce that's incredibly hardcore even though I appreciate the sentiment. That will probably also disincentivise users from leaving reviews

Having worked in ecommerce that's incredibly hardcore even though I appreciate the sentiment. That will probably also disincentivise users from leaving reviews because users will see their reviews disappear. And actually what's to stop people changing a listing if they're not happy with the current set of reviews? Some kind of slick UI to highlight differences from current listing to previous listing for a review might be a solid scalable compromise