This looks like it could be something very big about to explode. SF restaurateur Pim Techamuanvivit (aka chezpim) has discovered that seamless, its parent grubhub, yelp, and doordash have fraudulent listings for her restaurant(s). She doesn't do takeout or delivery. People are being defrauded, potentially big time, depending on how far this extends. I'd imagine it's the biggest problem with popular restaurants who don't offer takeout or delivery. She found out when someone called her restaurant about an order that hadn't arrived.
ETA: I think I screwed up embedding the tweets because clic