You're absolutely right and I have no interest in policing their reviews. But, if I do see one like the example I gave, I will report it as a goodwill gesture towards a good business. Several hotels do monitor their own TA reviews and can report fraudulent ones like a competitor posting untrue false reviews. However, this doesn't address the problem of businesses getting family and friends to post fraudulent positive reviews or businesses buying bulk positive reviews.

Still, TA is currently the most comprehensive source for hotel reviews and I think it is still mostly reliable. The trick for consumers is to actually read reviews and judge for themselves, rather than simply relying on the star ratings.