Earlier quoted context omitted.
The only way to describe this is as an unfortunate inevitability of review systems as a whole.
I'd say of unmoderated (or poorly moderated) review systems. E.g., we don't see this on Angie's List or Houzz. I've found that the only way to get useful information out of most Amazon reviews is to look at the 1- & 2-stars, trying to filter out the fake competitor hits, and see if there are any consistent issues that aren't DEU issues. Then look at the 3- & 4-stars and see what seems to be good. That said, I expect…
Ok sure, you can put it down to moderation, or you can put it down to size. What is the size of Angie's list to Amazon?