Zoiks pointed out: "Just think what would become of you..." is fear-mongering at its finest.
I noticed this statement in the article too, and it's designed to initiate fears or play on already existing fears that jws have and that are constantly pounded into them. They are made to think that they are nothing outside the congregational environment; that they will begin making poor, life-threatening decisions upon leaving. It's as if, as soon, as they walk out that figurative door, they'll become immoral, unethical, and incapable of any success in life.
When I left, I wondered if my life would go drastically downhill. Fact is, my life is pretty much the same. I didn't start cheating on my wife, cheating on my taxes, or stealing. I didn't start gambling or become a drunk. I just went to work and came home, spent time with my family, watched sports, etc. Same stuff I always did.