This idea come to my mind the other day preparing an encounter where a dragon should appear (details of the encounter are irrelevant here).
The comment is just for the fun and it is irrelevant at the game scale involving the players. The thing is that a dragon has 40 wounds. That means that, sticking to the game rules where you have the "Minimun Wound damage rule", to defeat a powerfull dragon thats is terrifying a town you only need something like 60 to 80 archers to take it down in ONE assault! May be also a captain to rally those who fail the terror test
The worst of it is that you don't even need crossbows ore powerfull missile weapons, slings are also ok!
I have to say that I love the "Minimum Wound damage rule" but maybe, when involving some very powerfull monsters like dragons or greater deamons, there should be a rule that says for example that you need a minimum weapon damage or so to inflict a wound. Otherwise, if I would be a PC, I would tell the mayor of the town trying to hire me to end up the dragon menace "Buy slings and arm all the townfolks of the city, the next time you see the dragon coming to flame down a house, orther the townfolk to shoot at him!, it is 10 gc for the idea, thanks"