Zombies, but also healthy survivors, sometimes get frustrated.
For example, if someone has their weapons taken away or the medical check takes too long...
And frustrated people may attack.
There should be a less lethal alternative for such situations — for example, a taser.
Tased individuals would then be moved to a kind of secondary quarantine — the holding cell.
Some characters should also be drunk, especially if they’re carrying whiskey in their pockets. They should have to sober up first.
This concept could possibly be extended to the camp as well — there could be a kind of morale system and if things get tense, fights might break out where the taser would need to be used.