They can say whatever they want. It has the same weight as signs on the backs of trucks saying they aren't responsible for damage by rocks or disclaimers on you

They can say whatever they want. It has the same weight as signs on the backs of trucks saying they aren't responsible for damage by rocks or disclaimers on your _receipts_ at parking garages disclaiming responsibility for damages. The practical effect is to spend basically $0 to reduce >$0 in people asserting their rights.