Most people are oblivious to their own mistakes, but they can spot someone else doing something wrong from a faraway distance. It’s the same with restaurants: if you’re the owner, you probably think your place is great, but if you’re a customer, then you’ll most likely notice everything that’s wrong with the place in a jiffy. And sometimes restaurants mess up so badly without realizing it that customers can’t help but snap a picture and upload it to the popular ‘Crappy Designs’ subreddit.