Two restaurants I really liked in Berlin, I talked to the owners about TripAdvisor:
Neither was listed. I wanted to add them and tell others about how nice they were.
They asked that I didn't put them (back) on TripAdvisor. Apparently people use sites like that to blackmail restaurants into service.
That's why we can't have anything nice.
Either TripAdvisor owns up and starts cleaning up false reviews, or it will get completely useless.
Maybe the "star" rating system needs to go, and only allow reviews. Rate restaurants on how well-written the reviews are, and people can read for themselves. It should make it a lot more work to actually sink a restaurant.