You are right. But keep in mind, those pathological customers are everywhere. Reviews are a big factor when deciding between competitive products, and your competitors will face the same pathological customers.

ReadItLater's free version is rated 1 star less than the pro version. All of the 1 star reviewers appear to be worth ignoring.

I'd install something like appirater to try to drown out the morons, and boost ratings. https://github.com/arashpayan/appirater/