2012 Scion XD Electrical problems

My battery went dead while I was at work as I had left the lights on. When it was time to go home, I was unable to unlock my doors with the key fob. There was one place to unlock the door manually and it was the driver door. I unlocked that and reached over to unlock the passenger door. I reached back to unlock the rear doors from the inside and was unable to do so. There was no way to open the rear doors. If there would have been anyone in the rear of the car they would not have been able to get out. I find this a huge scary safety problem. What if I would have had children in safety seats in the vehicle. They would have been trapped.

Purchased this car brand new. Was assured of toyotas 200 point safety inspection. Shortly after driving this car home I noticed that I never received a spare key and the horn didn't work (the first line of defense in driving safety). I returned to the dealership and asked if they took the fuse out to prevent the horn from sounding, they said "no, they never take any fuses out". They did not want to replace the fuse at first. They told me to go home and come back during service hours (i work, I already drove 30...