A little bit of moderated moral pushback has its place, but I think the main solution at societal-scale must be structural.
They say that everyone is a hero in their own story, and I think that applies here, you have good personal motivations (help a friend/spouse/family, etc) but ultimately what you're doing is no different from the consumer's perspective than the people that do this stuff professionally. It is just as immoral/misleading/dishonest.
They get upset with a service (Fakespot) which points out the bad behavior because it contrasts with their moral motivations for doing so. I think they need to re-examine right and wrong in this situation, Fakespot may not be the bad guy here.
They're positive because the headphones are utterly fantastic. They beat the crap out of the better-reviewed (on Amazon) Bose version. Which Fakespot gives a better grade to.