In addition to that they are a complete waste of your life, they teach false doctrines, and there are way too many Pharisaic rules that do not belong in a so-called Christian religion, there is the issue of dedication.
Does anyone realize that, once you dedicate your soul (which to them is your life) to Jehovah, you are sealing your fate forever? They are hoping that, maybe they are going to be working for 2-5 years recruiting others in, and then they will be ushered into a paradise where their problems will all be solved forever. However, they are actually sealing their damnation--which is all but impossible to be extricated from. You dedicate to Jehovah, not the organization (a disassociation letter only breaks the ties to the organization, but doesn't leave even a dirt mark on the Jehovah dedication). Thus, if you die and are reincarnated after the Washtowel is gone, you would be reincarnated into a family that has another Jehovah worshiping hybrid Jewish/Christian religion (and being strict in it), or a fully Jewish family (they also worship Jehovah). This would go on until the soul is dissipated, and I think accounts for those 6 year olds getting baptized and being trapped until they die.
This also deprives you the opportunity to fully dedicate your soul to another God at a later time. Your original Jehovah dedication remains on the astral. This doesn't create problems with most Christian denominations because they do not require you to dedicate your soul to Jesus. However, if anyone later chooses to dedicate to Jesus later, they are going to find doing so impossible because of the Jehovah dedication. With Jesus, this rarely creates a problem. However, with a growing number of people that are finding Satan, it also makes it impossible to fully dedicate your soul to Satan and, unlike with Jesus, this DOES create a conflict as the Jehovah dedication makes it impossible to fully dedicate to Satan. It is like paying one bill with money committed to another bill earlier. You are unlikely to get the full benefit from Satan, and there is zero benefit from Jehovah who simply holds your soul hostage.
You have only one soul. Yes, the waste of time is bad. Yes, the lost opportunities for education, sports, and social development are bad. But, I think the wasting your one and only soul on Jehovah is the ultimate. Usually, this translates to children getting reincarnated and not even knowing it, getting baptized at age 6 (and being held in high esteem), pious-sneering (usually under parental force) every school vacation, being pushed in the organization as adults, hating it but being unable to break free, and dying with a LIE-ble and 15 or 20 rags in their hands. I also think it has a lot to do with those who become inactive for 15 or 20 years, or get disfellowshipped or disassociate, and some 20 years later they end up going back. It is tied to the astral--along with the manifestation of being unable to function outside the cancer, they seem fated to spend the better part of their lives in some hybrid Jewish/Christian religion or as a Jew that worships Jehovah. Most of them hate it.