indoctrination

I have no problem people teaching religion to their children if it's something like the following: "This is what we believe, it's part of your cultural heritage, and we'd really be happy if you believe it too, but ultimately you are your own person and are free to decide for yourself." But I...

What are some indoctrination techniques used by religions and cults? Does anyone here have any person experience with these techniques? What are the best ways to counter indoctrination techniques?