My friend manages the online presence of a dentists, and nearly all negative reviews turn out to actually be about another dentist with a similar name about 60 miles away. So this does happen all the time on TripAdvisor, and they aren't doing anything about it! TripAdvisor makes zero attempt to verify that you've even been to the places you're reviewing, when it would be trivial for them to do so.
a simple "Please confirm this the place where you have been? <pictures>" while posting would prevent many (most?) errors.
You could use a plethora of other information to show this intelligently and not bother everyone (e.g. if you have been in the area, if you looked for the place beforehand etc)
