“Waivers don’t hold up in court“
There is one case where it did. I’m trying to find the reference but, as I recall, an experienced skydiver jumping out west (Las Vegas?) died in a landing accident. His family sued the drop zone. The drop zone counter-sued, using the waiver that said not only would they counter-sue, but the plaintiffs would be charged with the expenses. It took years, but the drop zone prevailed. They said it cost far more than they ever hope to get back, but felt it was important to establish a precedent.
If i find the case I’ll post it. I recall reading it sometime this century.