I do. I’ve been saying for years that it makes no sense at all for any person, be they a child or adult, to adopt the belief system of his or her parents just because it is the belief system of his or her parents.
That said, I remember as a child of about 6 or 7 y.o. experiencing an extreme terror of the annihilation of death, but being slightly comforted by my parents’ Christian belief in an afterlife. My comfort, such as it was, was based on solely on the belief that my parents would not lie to me. Though it must be said, I did harbor suspicions that that they could have been mistaken. How could they or anyone really know whether there was an afterlife or not? Anyway, as a result, in elementary school I considered myself a Christian, albeit an agnostic one.
By the time I was in high school, however, I considered myself a Hindu, and then in university, I turned to Buddhism, which I’m still exploring, though with a much, much more critical eye than before.
I would like to say that if, as a child, I had been able to understand and accept in a limited way Christianity, why would I have not also been open to Hinduism, Buddhism, or some other -ism?
I have no problem with kids being taught religion as long as it’s not just one religion, and no one insists that they have to “join” (whatever that means) any particular club. If they want to join up, that’s fine, but parents would do well to protect their kids from religious nutcases and zealous clergy.
Nevertheless, it does seem to me, that whichever religion a person chooses to belong to as a child (assuming he or she is given a choice) it is unlikely to be the one (if any) they belong to in later life. We grow up, and we change. It is only natural. Well, speaking personally, anyway.
When that does not occur, it’s probably due to what the OP means by the term “indoctrination”, which I would agree is unethical. And it’s not just parents who are often guilty of indoctrinating kids, members of the clergy I’d say are probably even more guilty.