I love theories…the more outlandish and seemingly impossible, the better. It’s great that you are always thinking.
Mayong Mistmoore is his own race of vampire. He’s older than any of the common player races. In fact, he’s said to have seen the first of Veeshan’s brood on Norrath. Perhaps something occured in those days that fueled his hatred of dragon kind . . .
Source: http://forums.station.sony.com/eq/posts/list.m?start=19&topic_id=50245#top
Vahlar-Dev
EverQuest - Lore of Norrath 