I think the problem here is that some of the less experienced CC's might try raising a potential problem with a customer in order to get them to sign a disclaimer.
My son is a lawyer and he tells me this:
If you know a carpet is going to shrink, or may shrink, it is negligence on your part to go ahead and do the job, with or without a disclaimer, simply because you knew the risk in advance and took it.
I never ask for disclaimers? Why? Because whenever I'm not happy with something, I don't do the job simply because I've been in this business for 34 years and have far too much experience of what customers are like when things go wrong and believe me going ahead with an iffy job just ain't worth it and besides, there's always some other idiot prepared to take it on.
Simon