In fact, let me add a comment to this. Someone may be willing to assume some risk but not a higher level of risk. But there’s no way to say “I’m willing to accept an 0.5% chance of something bad but not a 5% chance” by signing a disclaimer—the effect of the disclaimer is that when something bad happens, you can’t sue, which is an all or nothing thing. And a disaster that results from an 0.5% chance looks pretty much like a disaster that results from a 5% chance, so you can’t disclaim only one such type of disaster.
In fact, let me add a comment to this. Someone may be willing to assume some risk but not a higher level of risk. But there’s no way to say “I’m willing to accept an 0.5% chance of something bad but not a 5% chance” by signing a disclaimer—the effect of the disclaimer is that when something bad happens, you can’t sue, which is an all or nothing thing. And a disaster that results from an 0.5% chance looks pretty much like a disaster that results from a 5% chance, so you can’t disclaim only one such type of disaster.