The entire Hillsbrad questline was about Forsaken finding the living and then raising them again as forsaken.
In a desperate move to avoid being turned into undead they became Worgen to fight against the Forsaken.
This whole Forsaken choose to be raised and made to serve is a really really grey area.
Now we learn these Valkyr are related to a guy with domination magic… so mind control is really not outside of the realm of possibility.
