From what I've seen of "developing nations", a "gas station" is a roadside hut with a shelf of liter-size glass bottles and a skinny dude to pour the bottles into the tank of your motorcycle. Obviously no one would handle pressurized liquid ammonia in that fashion, because it isn't physically possible. One wouldn't imagine that developing nations are the target market for this anyway. The point is that lots of people know how to handle ammonia, and if the market expanded lots more people could learn. If we're serious about reducing carbon emissions (frankly that's an open question), what would be so terrible about bringing back filling station attendants?