There's a magnificent glitch with this quest. I think it's achieved through using the second ability of your cannon which stuns the drakes. You either have to fire it right before the quest ends, or you have to have two mobs already in a stun at the moment of quest completion. This way, the mobs won't despawn when you exit the quest and will continue chasing you for eternity.
But there's a twist! The mobs are enemies of every faction that is allied to you. And if you're far away enough from them, they'll prioritize other characters, for instance, town NPCs - achieved it at the Teron's Watch. I suppose they'll attack other players as well but didn't check it.
Both times I did this quest, it happened on its own without me trying to do it. The first time I didn't even understand what happened and thought that I just stumbled on a pack of crazy elites. And now was my second time. Cool!