I've seen a few of these in the wild just as a consumer and I always wonder why people even bother leaving a review. My thought is you're just exposing to everyone how ignorant you are.
Whereas I read "Unsatisfied! I did not read the listing!", they feel they wrote "Unsatisfied! Seller did not explain the item in the listing!" to the benefit of the other consumers in their same category. In a perverse way I could see it actually curbing those unwanted purchases in the future, but sadly at the expense of the seller.