So true, I remember about ten years ago I was really into listening to a guy on the Internet. I listened to him for some time and thought he was really good. Then it started coming out. He believed Jesus is a created being etc. That tell tale belief was hidden well within the site. No doubt this was not done by accident. He and the enemy knew that if it were on the first page many would run straight away. By having it hidden people would involve themselves with the ministry making it harder to leave him. During the time that I followed him, I saw many real Christians get involved with him. I also saw the disagreements and people leaving him. He cut some off, others saw him for what he was and left, but not without much criticism from him. Wow! What a lesson that experience was for me. Just when I think I have discernment, surprise. We better not ever stop asking God for more discernment.