Valid Reviews for common Reviewers

Usually a "product" it's been reviewed by a customer who bought a product or get it for free and he use it, validated his function, tested his satisfaction, etc.... Here even the best model that took dedication to achieve quality can be reviewed by a person that it didn't used the model, just posted one star and go away... this isn't fair. The idea it's for reviews not for comments, to restrict an example of the failure or the success with the proof, A generated image on the review.