This is way too complicated. Even reviews by people who made a real purchase are suspect. Amazon is full of such reviews where customers are offered a discount

This is way too complicated. Even reviews by people who made a real purchase are suspect. Amazon is full of such reviews where customers are offered a discount or a gift if they submit a positive review. I guess in a scenario similar to mine, you'd look for patterns. The same guy saying the same specific thing makes me think of a grudge too. However if it is multiple sources complaining about similar things, then it's a pattern. You'd also get to decide whether what matters to them matters to you. I think a sister comment was saying something similar. For example, it is routine where I live for people to complain about pizza joints that "do not even send ketchup" with delivery orders. This I am not too hung up on. :)