A lot of this hinges on fake reviews. It seems like it should be a solvable problem, but then I read about things like scammers going so far as to actually order their bogus products to real addresses of unsuspecting people (not caring what the confused recipients do with it) just so they can get a "verified purchase" review. Maybe they get caught, but by then, the damage is done.

I bought an electric leaf blower off amazon a couple years ago - the reviews seemed authentic and it seemed like the obvious one to buy. The thing had the power of like two hair dryers - I took the time to write a negative review but by then the product no longer seemed to be listed.