There is no goal to "ban negative reviews." That is an absurd interpretation of what I wrote. You are free to write negative reviews, for any reason, including

There is no goal to "ban negative reviews." That is an absurd interpretation of what I wrote. You are free to write negative reviews, for any reason, including being a shill who is paid to write fake negative reviews. Do it on a merchant's website, do it on your own blog or YouTube channel, do it in your local paper or at a bar with friends. Do it on a boat with a goat, where permitted by law. Businesses are then free to deny you service, suspend your account, investigate your activity, sue you for slander, etc.