These aren't real problems, most are easily fixed, but require adjustments to the cars. Automatically closing doors, many asian cars already have systems, hell, my car has it for the trunk, so why not build it for the sidedoor.
Hard alarms.
(Crude) Health detection systems.
And as already suggested, let the car drive itself to the EMS, firedepartment or policestation when in doubt, or at least towards the closest ambulance, so it also minimizes the time for the ambulance.
But all in all, let them pay dearly for people wasting time or trashing up the car, so full camera view of the car before the passenger enters, so you can see it was clean, and after..
It's not like many situations mentioned aren't happening with human drivers too.