I'm may be going out on a limb here, but the last time I read the US Constitution, I don't recall it saying anything for or against child pornography, so I don't think it'll be necessary to re-interpret the Constitution to update child porn laws.
I'm just mentioning that notable Legal Minds don't believe in adjusting laws. To some folks, a law is an immutable law, and you must follow it, whether you know that law exists or not.
