There is nothing free about the meals, but if people post about their experiences when going out for a meal, including how good or bad the service was, what mistakes were made, that the food was "bland" as a reason for giving a lower review, then it makes sense that those providing a high end dining experience will want to know about this stuff to provide the best possible experience. For a $500 meal, you'd expect nothing less than EVERYTHING being superb, and that means making sure that things that bother people are not there.
Now, if you want to "game the system", by making sure that your experience eating there isn't good because you provided incorrect information, that's just you looking for an excuse to rate the experience lower.
Think about it another way, if you know that Donald Trump was going to be there, setting things up where there are a lot of attractive women around the place would probably be in order, just knowing he is a womanizer who would be very happy if there were a large selection of prostitutes around to take care of his extra desires that are not a part of the menu.