Personally I was baptized as a baby but never had official religious education. My mother was, and still is a Christian Catholic (even though she heavily dislikes the church and other religious organizations), but since she never liked priests she never found any need in giving me such education. She taught me the basic principles of Christianity, mainly regarding love, sympathy, humanism and helping your neighbor, pretty much the nice part. I must say this didn't impact me negatively, even though as a kid I always believed in god (the Christian god) I was never indoctrinated in a way to compromise my rationality, judgement or critical thinking. Since age 14, I've been an atheist. In my particular case, my religious education given by my mother was very simple and she never threatened me with the 'you'll go to hell' phrase, she just told me to have faith, and that if I didn't have it god wouldn't be angry at me and would still love me. I do however agree with your post when you say that religion impacts a child negatively, and I think such actions should be controlled. It's not like I think teaching religion to kids should be illegal, I'm a law student and I understand the importance of religious freedom and freedom to educate your kids as you see fit. However, just like teaching your kids neo-nazism or fascism is illegal (in my country it is), teaching your kids the hateful part that compromises your judgement should be banned, even though it's almost impossible to implement such measure. I hope I helped
Whoever fights monsters should see to it that in the process he does not become a monster. And if you gaze long enough into an abyss, the abyss will gaze back into you
