People know what they are getting into when they join the Witnesses, they know the rules and what happens if they are unrepentant. You could argue that there are some who are perhaps too young to know the consequences properly, I could sympathise with that argument. However, that only speaks for a tiny minority of Witnesses.
SBF, as a baptised jw you know very well that, prior to baptism, no one is aware of all the rules that go along with becoming a jw. No one is told in their study how they will be treated if they pertain to question anyrthing they've been taught after baptism. How many people are told the full implications of the shunning rule? How many are made aware that stepping out of line might lead to their families being divided? If they told people those things during a study, there'd be a lot less baptisms than there are now, I suspect. People aren't given that information until they are brainwashed enough to not question it.
As for "some who are too young to know the consequences properly", if these kids aren't fully able to grasp what will happen if they reject wts teachings when they are older, then why the hell do the jws allow them to baptised in the first place? Why don't they encourage them to wait until they are around 18 - 20, or even older, when logically they should be better able to understand the consequences. In my experience, and I was a jw longer than you've been alive, kids were put under pressure to get baptised by both their parents and the elders when they were as young as 8 or 9. I have seen 9 year olds baptised: don't try to tell me that they knew what they were getting into, and don't try to tell me that their parents weren't aware of the possible consequences either, yet they went right ahead and pushed their kids into baptism. More than a few of those kids have now left the religion, and are shunned by their families. It seems a heavy price to pay for doing something at 9 or 10 that you didn't fully understand just to please your parents.