This upside-down fishy image is there to "out" companies that Yelp believes are spamming their reviews.
The Warning reads as follows:
"A number of positive reviews for this business originated from the same IP address, which may mean that someone was trying to artificially inflate this businesss rating…
Earlier this month, I attended the SemTechBiz2013 conference in San Francisco. This is a gathering of creators and designers of the semantic tech stack, folks who work on semantic web standards, and representatives from the search engines, all coming together to discuss the state of the industry…