I don't think this is unique to Amazon. I've gotten this on the iTunes app store quite a bit. Low ratings from people who don't review any other products (or if they do, it looks super spammy). On top of that, the bad reviews tend to come in bunches (multiple in a day), are void of any actual useful feedback or complaints and are just vague & angry (sucks, ripoff, etc). I've had decent luck with having Apple remove a…
Any type of system to respond would be useless for this particular problem.