It doesn't matter what kind of sign they have up saying they won't pay for whatever. If they damage it, they have to pay for it. Period. That is anywhere in the U.S. It is a part of business. If they don't pay for replacement or repairs then it is called vandalism. And you can press charges against them for it. If they try to say they don't have to, take a bat to the managers/owners car. See if they try to make you pay for it.