Will every house need a windsock? (As required by industrial use of anhydrous ammonia). Maybe an ammonia leak detector like a carbon monoxide alarm?
When gasoline spills the fumes aren't pleasant (to most people) but they seem fairly tolerable even at close distances.
Contrast with my experience of concentrated ammonia in the chemistry lab, where if you get one strong whiff it can send you reeling with burnt sinuses.
But I may not be aware of safety strategies that are already in use.
Then non-toxic freon was introduced and rendered those efforts irrelevant.
ammonia-absorption refrigerators of more or less the einstein-szilard type still aren't leak-proof, even without moving seals as you will easily learn if you go to a junkyard to find spare parts for one (they're still popular in rvs, and i stayed in a hotel room earlier this year that had one, manufactured within the last decade)
freon was a huge safety improvement over early vapor-compression refrigerants like propane and sulfur dioxide, but ammonia-absorption refrigerators are a different beast entirely
hopefully it's less dangerous now?