NPCs are not soulless automatons

NPCs are egregore-controlled humans, they still have an independent mind but their mind is enslaved and used as a tool for expressing the egregore mind, like a two-way radio channel.
see https://en.wikipedia.org/wiki/Egregore
Its possible to disrupt the link to egregore by subversive thought insertion(aka memes), allowing the original mind to assert its will and independent thought. The egregore can't focus on multiple mental challenges simultaneously and the "radio channel" has limited capacity.
NPCs can be reformed to PCs.

Science: Iron is an essential microelement. The safe dosage is well known.
Traditionalist: BAN ALL IRON BECAUSE SOME KID OVERDOSED!!! LOOK AT THIS DEAD RAT PIERCED BY IRON NEEDLE, LOOK AT HOW DEADLY IRON IS!!!