"Food Fight Grocery, for instance, is one of the most highly reviewed businesses of foodies in Portland, Oregon, because of the political activism its vegan owners encourage. The home page of the store's website even opts for a news and events blog over advertising its plethora of vegan products.

But Emiko Badillo, who owns the store with her husband, Chad Miller, says she doesn't look at Yelp or their reputation online.

'I think people still appreciate that we're casual and that we're really putting our own personalities into the business,' Badillo says. 'We run this business mainly for the activism side of it and to inform people about veganism.'"