> Every product has a defect rate and outraged customers are the most likely to post reviews. Therefore a product is likely to have an overrepresented proportion of negative reviews.

If I buy a product or a service, and it is defective or not what what was promised or not upto mark, I have the right to complain about it. Shutting down my valid complains because it would create an overrepresented proportion of negative reviews is downright wrong.