I grew up with vocally believing parents. I'm not really sure what lead to me "turning away" from the faith. I feel like putting it that way really disrespects my own choices in the matter - as if the only reason I'm not religious now is because my parents made bad choices? I see many, many, many reasons not to be religious and many poor examples of religion aside from my upbringing. Religion just didn't make sense to me, and still doesn't. I see a trend for less common/less severe religion and I hope it continues, because in my mind it will make the world a much better place. If I have kids I hope they'll at least think about the matter without blindly accepting any faith.
However, I can tell you some things my parents (mostly mom) did that I wouldn't wish on any kid, even if it would "scare him away" from religion:
-violated my personal space and freedom by restricting access to and taking away gifts/personal property because it was "evil". I'm talking things like sailor moon (yes, really), pocahontas (talking tree=demon), anything with unicorns/dragons/whatever in it, and so on. she saw demons in
everything - god forbid the word "demon" or "devil" was ever mentioned - even in the context of being slain by good guys! even as a child I knew this was ridiculous.
-being ridiculously overprotective about sex. as in, I wasn't allowed to listen to the spice girls because they dressed sluttily. I constantly got lectures about how very sinful it was to have sex before marriage. I wasn't allowed to read a lot of books because they mentioned two characters having sex out of wedlock (not described, mentioned - and yes that cuts out a lot of books, since I was reading at an adult level very early on). I gave my sister a book for christmas a few years back, when she was about 16-17, and mom confiscated it because it mentioned (not described) sex. Keep in mind my sisters go to a low-income school and neighbourhood - it's not exactly classy or proper. This hasn't been a rare occurance, unfortunately.
-forced me to go to church every week and when I falt-out refused, attempted to bribe me. I absolutely hated the experience and it certainly didn't make me more religious.
-continually made comments about how sinful "certain lifestyles" were. If I had been gay I would be pretty bitter about it by now, I'm sure
-making comments about how God hates this and that behaviour, and trying to guilt-trip us into behaving so we wouldn't make god sad
-teaching the bible as literal truth and encouraging us to refuse to think about any alternatives because we'd become "brainwashed" (yes, the irony). told us that scientists were trying to "trick us" and showed us a ton of "creation science" videos giving "arguments" against evolution.
I'd certainly like to think that even with more moderate parents, I'd still end up with my current beliefs, and given my personality I do strongly believe this is so. Still, I'm all for the cause of not fucking up kids anymore than necessary, so good luck.