Are false images of the Truth.
These organizations are usually led by an extremely inspirational leader. First thing to mind is usually a personality like Jim Jones, of the People’s Temple in Jonestown, Guyana, who poisoned and murdered 918 of his followers.
Cults can be a lot more subtle however, and many people still join cults unaware. Any organization that influences you to participate in any activity that goes against Truth, or that somehow punishes you for non-compliance to their own set of arbitrary rules (not tithing, not witnessing, not working) can possibly be a cult.
Do not join any (See Influential religions)