Yes they should be killed because  they could kill us and they could  are enemies  forces and make them even harder to kill because they will have protection.

No they shouldn’t because they could give us stuff for meds and they could protect us from the goblins and our enemies.

I don’t think we should kill them because of the science discoveries or cures for diseases.

(TV)  WANTED URGENTLY A DRAGON HUNTER!! Do you need money  then this is the job for you! you will have to hunt down 3 naughty dragons. They are, spotty water and ender dragon. In return we will give you 5 golden coins from a rare money tree, a free boat ride and a pot of dimonds.