Usually the carpark ticket has a fine print disclaimer saying that they are not liable for any damage or loss. So the fact that you accepted the ticket and agreed to park in their place, eh di na daw nila problema.

But then, there are some senators / mayors who want this practice abolished. The last I heard regarding this was a year ago. Siguro nagiingay lang sa mga mall para bigyan sila ng 'contribution' para tumahimik hehehe...