Or them turning into zombies when you photograph them. Because, you know, you did take away their soul. And add a lactose-intolerant mountain!
Making "shoving powdered aluminum up your nostrils" a hobby for colonists and give powdered aluminum a dedicated industry.
http://en.wikipedia.org/wiki/Martin_and_Osa_Johnson 1918, but who cares about anachronism. They have hoods and aviator goggles, and made a film titled "Among the Cannibal Isles of the South Pacific".
If citizens lose an arm or leg, they should be able to get clockwork replacements provided there's an appropriate building in the settlement! Chainsaw arms for the overenthusiastic lumberman! Rocket legs for the explorer who cant explore enough! Chest cannons for the dutiful soldier! Spring loaded scalpels for the insane doctors!