Here's generally how it works, though most vendors don't realize it. When you rent space you're basically liable for anything that happens in that space, sign or no sign. This is why a lot of market vendors spend the $35 a month or so for liability insurance, because you can't defend against stupid. The markets will have their own liability insurance but it will probably only come into play if the vendor fails to have it, and then of course the vendor is in a real messy situation. But this is only "if" something happens in your rented space. This is also why a lot of vendors arrange their space so all of the product is around the outside edges, so customers can't physically enter the rented space and then trip and fall or something. But honestly, I've sold all kinds of stuff, been around hundreds of vendors, and if you just use common sense you should have no problems, people don't come to the markets looking to get injured.