My Yelp story: I was a pretty active user. I enjoyed writing funny reviews of crappy places. One day I was trying to look something up and got a pop-over to confirm my account info. I clicked through and went on with my day. A few weeks later I received notice that my account was deleted. I contacted them and was informed I was too young to use the site and there was no chance of account recovery (I was a few years over 18 at the time). All of my reviews were gone. Emailed them, no chance of getting those back, though I was welcome to create a new account.<p>So, they managed to disappear all the reviews I left. They did it on a technicality and it was well within their terms of service. However, I view this as vote manipulation. They&#x27;re pushing really hard now to say they don&#x27;t do that. They burned me once though and now I actively avoid the service.