I'm pretty sure you can't disclaim liability in the US just with a sign either. All of those 'park at your own risk' signs mean nothing when a runaway shopping cart puts a big dent in your door. A shopping center is responsible for their carts, but not for your car being broken into - things like that. Those signs are just there to make people think they can't sue.
When I was in college I played a lot of intramural softball. Of course you had to sign a release that if you get hurt in the regular course of the game the school wasn't liable. Fair enough. My problem was that they allowed these insane metal softball bats, triple-walled ones that can turn Gary Coleman into Jose Cabrera. As the pitcher I didn't like balls flying at my head (insert gay joke here) at those insane speeds.
I complained and was promptly told 'you signed a waiver'. I made it clear that I didn't sign a waiver for negligence and they were being negligent by allowing unsafe bats, moreso now that I've brought the issue to their attention. They changed their tune pretty quickly after that.
When I was in college I played a lot of intramural softball. Of course you had to sign a release that if you get hurt in the regular course of the game the school wasn't liable. Fair enough. My problem was that they allowed these insane metal softball bats, triple-walled ones that can turn Gary Coleman into Jose Cabrera. As the pitcher I didn't like balls flying at my head (insert gay joke here) at those insane speeds.
I complained and was promptly told 'you signed a waiver'. I made it clear that I didn't sign a waiver for negligence and they were being negligent by allowing unsafe bats, moreso now that I've brought the issue to their attention. They changed their tune pretty quickly after that.