When this client refused to pay an ad designer for their work, the designer decided to cut their losses and settle for a bit of revenge instead. They had been granted access to the client's Facebook page to set up the advertisements, and those privileges had not yet been removed. After being stiffed by said client, this topic was posted to r/pettyrevenge by u/BigPower6749. The post is currently sitting at 10k upvotes. They explained how they exacted their revenge in the post, “Her ads are still…