The dumbest thing ever about this show is that even though they know that if a person dies they will turn, yet in the prison they go to sleep with everyones cell doors open. I mean how stupid are they all? I mean if one person died in their sleep, they could potentially wipe them all out, whereas all they need to do is shut their cell doors and problem is easily solved, the chances of a zombie getting through 2 shut cell doors would be zero.
Personally if I was in charge everyone would have a set time they had to be in their cell by at night and one person would be responsible for checking they were all shut before going to sleep.
If a person didn't shut theirs they would be somehow punished for doing so, like having to do extra chores, etc, so it would ensure they complied with this simple rule for the safety of everyone.
Another rule would be that everyone keeps a weapon in their cell 24/7 and is not to be removed from the cell, so should zombies manage to get in, they can slowly kill them one at a time to get away safely and people would know where to go to get a weapon, etc.
Obviously with there being kids, said weapon wouldn't be a gun but a spear type weapon, and it would be placed out of reach, etc.
Me personally though I would lock my cell every night using rope or a chain, etc so I knew it was safe to sleep.