It's just the way people in cults view those who leave the cult. It doesn't matter if you're a Mormon or a JW or whatever, they all think someone who leaves them must be posessed by demons or crazy but we all know who the real crazy one are.
If you are not sure try this: Check to see what kind of underwear you are wearing. Did you by at a department store or did you buy it through your church? Is having a cup of coffee, coke or a beer just something you do or don't do or is it a religious issue to you?
This past Saturday did you play golf, go to the beach, go out for breakfast ? Or go through your neighborhood in 90 degree weather peddling religious magazines in a business suit?