>Most people who write reviews aren't exactly the most mentally stable people either. If you're not getting something in return, most people won't write a review, that just leave the nut jobs.

Baseless, callous accusation. And the conclusion is wrong too. Without getting something in return, people write genuine reviews with multiple different intents: out of feeling of obligation, support, appreciation. Out of discontent. As a substitute or alternative for customer support. To help other people find the thing, or to dissuade them from an unworthy purchase.