Now, before you start raging at me, please allow me to explain.
We all have a general idea of what a cult is. However, few outside academic circles have a serious understanding of the real nature of the term. Recently, I became interested in the topic, and learned of what is known as the Bite Model, the model used in sociological studies to determine whether an organization displays cult-like tendencies. And, when I went back to listen to Before the Storm, a few too many pieces started to slide into place. I performed a comparison against the Bite Model, and, well, allow me to show you my results.
The Bite Model is divided into 4 main sections, with points subdivided into these sections. For each section, I will state the overall match, as well as a few key points I thought worthy of mention.
Section 1: Behavior Control
This section is, frankly, the least followed of all of them. The Forsaken have a frankly surprising amount of freedom in their mobility, at least within Horde territory. In addition, the nature of their undeath precludes much of the behavior control techniques common to cults. They don't eat, sleep, or reproduce, all factors humans can be easily controlled through. A promising start, but can the Forsaken keep it up?
Section 2: Information Control
No. No they could not. One of Sylvanas' defining traits as a leader is her mastery of information manipulation, and the lengths she'll go to to keep control of the narrative. Before the Storm is filled with damning evidence of her willingness to lie and manipulate. On a small level, we see the restriction of information flow from the human past. Parqual, a historian and former member of the Desolate Council, informs us in the book of being forced to smuggle into the Undercity books on human history. Any time he attempted to bring them in openly, they were seized by Sylvanas' forces, and Parqual was informed he was to sever any ties with the past, that the only history worth remembering is the Forsaken history. This is textbook cult behavior.
On a larger scale, consider the massacre at Arathi Highlands. Sylvanas murdered any Forsaken, defector or not, who could possibly contradict her narrative that the humans were evil monsters who had turned their backs on the undead. She specifically phrased it as "rooting out the seed of hope".
Section 3: Thought Control
Sadly, the Forsaken run into serious issues here as well. Sylvanas' constant reinforcement of the concept of "Forsaken first, the rest never" is a serious red flag for cult behavior. Forcefully disconnecting individuals from any potential source of dissenting information is an important step in cult indoctrination, and teaching members that the rest of the world hates them is a prime way of accomplishing that. Forsaken also become masters of denial and rationalization, permitting the most heinous acts because their Dark Lady permits them. This deification of the leader is the primary source of a cult leader's power and control.
I would also like to point out something small, but certainly not minor: the encouraged alteration of names. We learn, once more from Before the Storm, that the Forsaken highly encourage the newly raised to take on new names, to signify their "rebirth" and separation from their past. Two great examples are Nathanos Blightcaller and Velcinda, former leader of the Desolate Council. This renaming process allows cults to instill a new identity in members, one fully controlled by the cult, and separate them from any past experiences. In essence, renaming is an attempt to kill the past of members.
Section 4: Emotional Control
This section becomes... murky. The very nature of Undeath causes a number of emotional issues; namely, the reanimation process effectively seals off positive emotions, due to the incomplete soulbinding process. How much of the Forsaken's clear emotional instabilities are due to this handicap, and how much is due to cult-like behavior? For this section, I want to stress I am trying to be as stringent as possible, only taking the most obvious of examples in an attempt to be fair and balanced.
As such, next to section 1, this is the second-least followed. However, we do know there is a serious campaign to "poison the well", as the term goes, against the living by Sylvanas. The only Forsaken Sylvanas allowed to survive the Arathi Massacre were those who came back early, turned away at the last minute by their loved ones. When Sylvanas speaks to Annie, we can see her active attempt to instill bitterness and hatred towards the living in these Forsaken. The plan being that these individuals will then go back to the Undercity, further causing distrust of living family and friends.
Sylvanas, prior to the meeting, also actively demonstrates that she did not want the meeting to occur, but that she agreed for the sake of the Council. She privately expected things to go badly, but with her statements placed the blame for it at the feet of the Council. The leader is infallible, any mistakes lie with the cult members.
Summary
The Forsaken showed clear cult behavior for sections 2 and 3, and serious cult-like tendencies for section 4. The only outlying section is section 1. Overall, I score Bite Model Compatibility for the Forsaken at 65%-75%, give and take based on individual points and subjective opinions.
Conclusion
Based on the evidence provided, I would conclude that Sylvanas' Forsaken are cult-like at best, a full-blown cult at worst. Sylvanas' mastery over information and thought is among some of the most infamous cult leaders of our time. Her only major weakness is in behavior control, and that is clearly not an issue when looking at other areas.
Biases and Issues
I want to be open here, I came into this analysis despising Sylvanas. I believe her to be a psychopathic tyrant who needs to be stopped. I am also someone who mains a Night Elf, and who is deeply immersed in the lore. I admit these things freely, as we must all understand our own biases. However, I assure you, I have done my diligence, as all researchers must, to set aside my biases and look at the data as objectively as possible.
I also want to raise the fact that the Bite Model is not fully, well, compatible with the sort of world Warcraft has set up; namely, medievel high fantasy. The Bite Model was developed to understand cults in our modern day, with all the freedoms we take for granted. What would be a cult in today's America would be commonplace in, say, Ancient Rome. As such, keep in mind there may be a certain disconnect between story and model, and take such into account when drawing your own conclusions.
If you have made it this far, I thank gor for sticking through this long post, and I hope you may be able to add to tbe discussion in the comments!