They really should allow the owner to respond. I personally know of one instance where a rogue business owner had friends, family, and employees shill reviews for him and put negative reviews out for the local competition.
Pretty whack that you can make up an account and post negative **** under anyone's page.
I went to see a doctor in another town on a whim and was instantly given out paperwork/info about posting a rating on kudzu.com. I told him I would post a review and was given out massive samples and 2 narcotic scripts. I go to leave him a review and find he is like 200 reviews. People that told him they were not going to leave a review got below average care.