Honestly, the ratings on those sites are essentially useless anyway, because people are bad at reviewing.

I generally sample the lowest rating written reviews, to check if people are complaining about real stuff, or are just confused. For instance, if a hotel doesn't have a bar, some of the negative reviews will usually be about how the hotel doesn't have a bar; these can be safely ignored as having been written by idiots (it is not like the hotel is hiding the fact that it doesn't have a bar).

Occasionally some of the positive reviews are similarly baffling. Was recently booking a hotel in Berlin in January, and the top review's main positive comment about the hotel was that it had heating. Well, yeah, I mean, you'd hope so. I can only assume that the reviewer was a visitor from the 19th century.