The Smallsword of Doom wrote:
If our characters are alive and willingly joined the Death Knight cause, they not only betrayed their own race but their entire faction. Why should another faction trust them now?
Why would their *original* faction trust them at all? I'd think the enemy faction would take them in first... the enemy of my enemy is my friend, after all. Besides, Death Knights have everything in common with the Forsaken: They're undead who have regained their free will and have left Arthas' cause behind.