Why, if you're thinking of buying the product from the same vendor, would you not reconsider buying from a different vendor just for shipping issues? Shipping is a major part of buying something online, so I don't think it's a bad review to have available
It's a review of the process or the seller, not the product. That having been said, Amazon and most similar online retail "marketplaces" make the seller much less visible than the product, encouraging the reviews to go in the wrong place.
I like how you've reduced the entire internet to just Amazon. It is possible to have reviews on other websites. I know they really try to keep that a secret though.