High controlling segregating religious organizations are subjectively working cults by definition, its just that they all have a specific variance of that control.
One could identify if an organization is a highly controlling cult by these ways of operation.
1. Opposing critical thinking
2. Isolating members and penalizing them for leaving
3. Emphasizing special doctrines outside scripture
4. Seeking inappropriate loyalty to their leaders
5. Dishonoring the family unit
6. Crossing Biblical boundaries of behavior (versus sexual purity and personal ownership)
7. Separation from the Church