I agree that, for the most part, dining reviews are subjective and should be read as one person's opinion. However, when a number of people continue to have a similar opinion, I start to pay attention to what they are saying. At the same time, I don't believe everything I read on message boarads. There are people who like to "jump on the train" and agree or disagree with what others have written. There are some "cheerleaders" who post the same opinion over and over.
We are willing to try almost any restaurant once, and we try to include on every trip at least one place we haven't eaten. If we enjoy the restaurant, we go back again. If we don't enjoy it, we usually wait a few years and give it a second chance. I realize everyone can have a bad night, and I don't think it is fair or even in my best interest to decide I never want to eat at a certain place simply because the food wasn't as good as I had expected on one visit.
There are a few restaurants we have tried once and decided we never want to go again. We hated Whispering Canyons, not because of the food, but because of the noise and atmosphere. Some families love the restaurant for the reasons we don't like it, and that it fine. There are restaurants for every taste and preference, and that's one of the things I love about Disney World. I had read enough reviews to know it didn't sound like a restaurant we would love, but I tried it once so I could form my own opinion. I can appreciate the appeal for some families, but it wasn't something we enjoyed.
I read reviews to get a variety of opinions, I am willing to give almost every restaurant a chance, and then I form my opinion based on my experience.