I have a ten year old kid who still believes in Santa claus
Irrelevant.
Childrens minds are not the same as adults, they can be victimized and not even know it.
That's why the parents get to decide until the child is competent.
Lets say I have tattoos all over my face and so does my wife. My kids see how happy we are...and wants to have tattoos all over his face at 10 years old...
Again, parents decide, not
you.
You have now limited this kids potential in life because of the twisted thoughts of a ten year old and parents who lack of sight.
I have done nothing.
You have violated their rights.
So in this case a law is not a bad idea......and to my main point to use this argument is just setting back Libertarian causes.
Basic principles--liberty requires allowing your neighbor to have his liberty. Your fascism sets back "libertarian causes," liberty does not.
Edit: "not liberty" --> "liberty does not"