That crap is only used to scare off the common folk. They are legally responsible for anything that happens to your car under their care. Even those parking lots that issue a tag saying "We have NO responsible" get sued and lose. It could take a well written lawyer letter sent to the SOB's but the car owner will win.
No, I'm not a lawyer but have a good friend who is and have seen this same info on TV news shows. Legal letters scare people into coughing up when they realize it's cheaper to settle than fight it..ken