Yes, they do. But they can always "unchose" it if they want. And all they will have "suffered" is moral teachings that help them not have the problems common to many other kids growing up. They are taught not to smoke, drink, do drugs, engage in premaritcal sex. They are taught to be of service to their fellowman, to speak in public, to develop their talents. Sure hurts them for that early choice, doesn't it.
It never phases Charity to be completely inconsistent and even contradictory.
According to LDS theology, the baptismal covenant is THE most serious covenants that one undertakes in their entire life. But because Charity is a True Believer, her thinking shifts mid-track when her religion is discussed. Now, suddenly, an eight year old is capable of making the most serious decision of his/her life. And, of course, all its teachings are the best possible teachings. God knows what a miserable life they would have outside the church!!
(by the way, adding to the silly anti masturbation ban that harms youth, the anti-gay teachings, the patriarchal practices and attitudes of the church that slot human beings into predetermined functions, paying ten percent of one's income to the church despite one's financial situation, viewing oneself as chosen and elect and a god in embryo - just off the top of my mind - are teachings that do harm)