I grew up on a no soda no candy diet enforced by my parents. Carob Easter Bunnies were a bit harsh, but otherwise I am better of for it. I was once forced to return some HoHos I had bought myself. While carding seems a bit extreme it is not far off and does not infringe on the civil liberties of a child. There are lots of rights children don't have because of the responsibility they require. I think sugar falls within the realm of a child being unable to make the right decision of it's proper consumption amount.