Ask Reddit is the place to find answers to the most random questions. But occasionally you’ll find some insight there that can be really helpful.

In one case, a (now deleted) account asked “Chefs, what red flags should people look out for when they go out to eat?” wanting to know what should make someone leave a restaurant if they see, hear, smell, taste, or otherwise sense it in their gut.

Some amateur restaurant-goers chimed in, while others simply quoted Anthony Bourdain’s classic Kitchen Confidential, but it was largely restaurant workers who had the most interesting answers. You might not agree with them all, but here’s what gave us food for thought: