What he said.
We ran into this when FIL went to a recovery place after some surgery. He was to be there for maybe three weeks or so and they tried to get DW to sign forms accepting financial responsibility if his assets ran out. I told the wench what to do with her forms. DW was a tad upset about that but I knew what she was trying to pull on us. They still admitted him.
I think a lot of people just sign. I guess that's what they're counting on. Sad.