I’ve seen a few legal challenges over time. I recall a student at one school caused some damage on the ground, the school gave them the excess bill, well they lawyered up and got that overturned. The said school, which is now long closed, had a waiver everyone needed to then review and sign.
I was told there is a few legal cases going on at the moment with some certain GA owners around both workcover, and fairwork.
Safety Departments, even at smaller GA operators, often will require pilots to read and sign off on some safety alerts, while these are education, they are also filed away and kept on hand for any potential future legal needs. I’ve know one operator who sacked someone who breached rules continuously after signing, the employer won when it went to court, that piece of paper played a big part.