Mostly yes

Some exceptions: "voting age" I am against voting (both kids and adults) to the extent that participation furthers the state's coercion. There are some cases where voting actually serves to limit state coercion, such as letting blacks vote in order to fight back against Jim Crow or to remove politicians who have accumulated too much power. But for the most part giving someone a vote is just a euphemistic way of giving people a hand in the force of law. It's wrong to use force against random people overseas, so why would it be OK against your next door neighbor? And why would it be OK to teach children that it's acceptable to solve problems with force? "parents owning their children" Child custody isn't quite the same as outright "owning" children. I don't think there's necessarily anything wrong with parents exercising custody so long as it's similar to hosting a guest. As the homeowner, the parent gets to set boundaries about what the guest/child is allowed to do while there. That being said, I'm against using the law to support a parent's claim of child custody and if the child decides he likes it better at grandma's or with Mr. Wilson next door, he should be able to get his ass in gear without any legal repercussions for anyone involved. If anyone thinks the child's choice is problematic, they should find a way to resolve that amongst themselves. No one should be able to call the cops on a pedo just because their child keeps sneaking out to spend time with him. "medical consent" Informed consent should apply no matter the patient's age if a doctor wants to maintain reputable ethical standards, so forcing medical procedures on patients is not acceptable. But at a certain point acquiring informed consent cannot be expected, such as with babies and toddlers or the comatose in which case the decision must fall to someone else. Ultimately, he who pays the piper calls the tune and that's typically the parent. And if a boy wants a sex change doctor to give him a vagoogoo for Winter Solstice, then he'd better break open his own piggy bank or be an independently wealthy child actor or something.