Do you think that Therians are really a cult?

This may sound dumb but I ask this because last month therians (people who dress and act like animals and really believe that they are animals) became more popular, I think they are crazy. I also know about people who claim to be the second coming of Jesus Christ (Like Shoko Asahara, leader of the Aum Shrinkiyo cult) and people who claim to be aliens and other who claim to be vampires.