As a touroperador who offers its services on Tripadvisor, I have had different bad experiences. My last bad experience was with a review I got. As a platform where reviews are very important you would expect that there are clear guidelines about writing and placing them. I got a negative review (which I don´t might as long as it is fair) from someone who made a reservation for a walking tour and the guide didn't show up. However I don't offer a walking tour. If you read the review it is clear it is not directed at my tour because the review states the name of the tour, the time it starts and the meetingplace. Which are all different from the tour I offer. So I asked Tripadvisor to remove the review. Tripadvisor sent me an email in which they told me they don't want to remove it. When I asked them why, they answered that the writer of the review had had contact with someone from my company. So I asked when that person had contact with someone from my business and they didn't answer the question. It looks like anyone can randomly review a tour without the need to really join the tour. No wonder all the complaints about fake reviews!