Does Yelp verify that buiness actually exist? If I was in the US, had too much time and money on hand it'd do the following: Start serveral business and make s

Does Yelp verify that buiness actually exist? If I was in the US, had too much time and money on hand it'd do the following: Start serveral business and make sure they never actually serve costumers. Sign them up with yelp. Write a few positive and negative reviews about them. Spend money on yelp advertising on some of them. See how they compared to the control group. If the rumors are true, sue them with anti-mafia-laws. The fact that nobody has done this yet colors me very skeptical about the claims.